- M.A.C.E. Space Shooter (Switch eShop)
- M.C. Kids (NES)
- MaBoShi: The Three Shape Arcade (WiiWare)
- Mace: The Dark Age (N64)
- Mach Rider (NES)
- Machinarium (Switch eShop)
- Machine Knight (3DS eShop)
- Mad Age & This Guy (Switch eShop)
- Mad Carnage (Switch eShop)
- Mad Dog McCree (3DS eShop)
- Mad Men Football (Wii U eShop)
- Madden '95 (GB)
- Madden '96 (GB)
- Madden '97 (GB)
- Madden NFL 07 (Wii)
- Madden NFL 08 (Wii)
- Madden NFL 09 All-Play (Wii)
- Madden NFL 10 (Wii)
- Madden NFL 11 (Wii)
- Madden NFL 13 (Wii U)
- Madden NFL 2000 (N64)
- Madden NFL 2002 (GCN)
- Madden NFL 2005 (GCN)
- Madden NFL Football (3DS)
- Madolica (Switch eShop)
- Madorica Real Estate (Switch eShop)
- MadStone (WiiWare)
- MadWorld (Wii)
- Maestro! Green Groove (DSiWare)
- Maestro! Jump in Music (DS)
- Mages of Mystralia (Switch eShop)
- Magic Destiny - Astrological Games (WiiWare)
- Magic Nations (Switch eShop)
- Magic Scroll Tactics (Switch eShop)
- Magical Diary: Secrets Sharing (3DS eShop)
- Magical Drop II (Neo Geo)
- Magical Drop III (Neo Geo)
- Magical Starsign (DS)
- Magical Vacation (GBA)
- Magical Whip: Wizards of the Phantasmal Forest (DSiWare)
- MagiCat (Switch eShop)
- Magician Lord (Neo Geo)
- Magician's Quest Mysterious Times (DS)
- Magikarp Jump (Mobile)
- Magnetic Joe (DSiWare)
- Magnetic Soccer (GB)
- Magnetica (DS)
- Magnetica Twist (WiiWare)
- Magnetis (WiiWare)
- Mahjong (WiiWare)
- Mahjong (DSiWare)
- Mahjong (Wii U eShop)
- Mahjong (Switch eShop)
- Mahjong 3D - Essentials (3DS eShop)
- Mahjong 3D - Warriors of the Emperor (3DS eShop)
- Mahjong CUB3D (3DS)
- Mahjong Deluxe 3 (Wii U eShop)
- Mahjong Deluxe 3 (Switch eShop)
- Mahjong Mysteries - Ancient Athena (3DS eShop)
- Mahjong Quest Expeditions (DS)
- Mahjong Solitaire Refresh (Switch eShop)
- Mahjong Stories: Vampire Romance (Switch eShop)
- Mahjong Taikai Wii (Wii)
- Maid of Sker (Switch)
- Major League Eating: The Game (WiiWare)
- Major Minor's Majestic March (Wii)
- Majyuuou (SNES)
- Make Up & Style (DSiWare)
- Malibu Beach Volleyball (GB)
- Mana Spark (Switch eShop)
- Manhunt 2 (Wii)
- Manic Monkey Mayhem (WiiWare)
- Manticore: Galaxy On Fire (Switch eShop)
- Mantis Burn Racing (Switch eShop)
- Manual Samuel (Switch eShop)
- Mappy (VC Arcade)
- Mappy-Land (NES)
- Marble It Up! (Switch eShop)
- Marble Madness (GB)
- Marble Power Blast (Switch eShop)
- Marble Saga: Kororinpa (Wii)
- Marenian Tavern Story: Patty and the Hungry God (Switch eShop)
- Maria The Witch (Switch eShop)
- Mario & Luigi: Bowser's Inside Story (DS)
- Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey (3DS)
- Mario & Luigi: Dream Team (3DS)
- Mario & Luigi: Paper Jam (3DS)
- Mario & Luigi: Partners In Time (DS)
- Mario & Luigi: Superstar Saga (GBA)
- Mario & Luigi: Superstar Saga + Bowser's Minions (3DS)
- Mario & Sonic at the London 2012 Olympic Games (Wii)
- Mario & Sonic at the London 2012 Olympic Games (3DS)
- Mario & Sonic at the Olympic Games (Wii)
- Mario & Sonic at the Olympic Games (DS)
- Mario & Sonic at the Olympic Winter Games (Wii)
- Mario & Sonic at the Olympic Winter Games (DS)
- Mario & Sonic at the Rio 2016 Olympic Games (Wii U)
- Mario & Sonic at the Rio 2016 Olympic Games (3DS)
- Mario & Sonic At The Rio 2016 Olympic Games Arcade Edition (Arcade)
- Mario & Sonic at the Sochi 2014 Olympic Winter Games (Wii U)
- Mario + Rabbids Kingdom Battle (Switch)
- Mario + Rabbids Kingdom Battle: Donkey Kong Adventure (Switch eShop)
- Mario and Donkey Kong: Minis on the Move (3DS eShop)
- Mario Bros. (NES)
- Mario Bros. (Arcade)
- Mario Calculator (DSiWare)
- Mario Clash (VB)
- Mario Clock (DSiWare)
- Mario Golf (N64)
- Mario Golf (GBC)
- Mario Golf: Advance Tour (GBA)
- Mario Golf: Toadstool Tour (GCN)
- Mario Golf: World Tour (3DS)
- Mario Hoops 3 on 3 (DS)
- Mario is Missing! (NES)
- Mario is Missing! (SNES)
- Mario Kart 64 (N64)
- Mario Kart 7 (3DS)
- Mario Kart 8 (Wii U)
- Mario Kart 8 Deluxe (Switch)
- Mario Kart Arcade GP (Triforce)
- Mario Kart Arcade GP DX (Arcade)
- Mario Kart DS (DS)
- Mario Kart Super Circuit (GBA)
- Mario Kart Tour (Mobile)
- Mario Kart Wii (Wii)
- Mario Kart: Double Dash!! (GCN)
- Mario Paint (SNES)
- Mario Party (N64)
- Mario Party 10 (Wii U)
- Mario Party 2 (N64)
- Mario Party 3 (N64)
- Mario Party 4 (GCN)
- Mario Party 5 (GCN)
- Mario Party 6 (GCN)
- Mario Party 7 (GCN)
- Mario Party 8 (Wii)
- Mario Party 9 (Wii)
- Mario Party Advance (GBA)
- Mario Party DS (DS)
- Mario Party: Island Tour (3DS)
- Mario Party: Star Rush (3DS)
- Mario Party: The Top 100 (3DS)
- Mario Power Tennis (GCN)
- Mario Smash Football (GCN)
- Mario Sports Mix (Wii)
- Mario Sports Superstars (3DS)
- Mario Strikers Charged (Wii)
- Mario Super Sluggers (Wii)
- Mario Superstar Baseball (GCN)
- Mario Tennis (N64)
- Mario Tennis (GBC)
- Mario Tennis Aces (Switch)
- Mario Tennis Open (3DS)
- Mario Tennis: Power Tour (GBA)
- Mario Tennis: Ultra Smash (Wii U)
- Mario vs. Donkey Kong (GBA)
- Mario vs. Donkey Kong 2: March of the Minis (DS)
- Mario vs. Donkey Kong: Mini-Land Mayhem! (DS)
- Mario vs. Donkey Kong: Minis March Again! (DSiWare)
- Mario vs. Donkey Kong: Tipping Stars (Wii U eShop)
- Mario vs. Donkey Kong: Tipping Stars (3DS eShop)
- Mario's Picross (GB)
- Mario's Super Picross (SNES)
- Mario's Tennis (VB)
- Mario's Time Machine (NES)
- Mark of the Ninja: Remastered (Switch eShop)
- Mars or Die! (Switch eShop)
- Mars: Chaos Menace (Switch eShop)
- Mart Racer (WiiWare)
- Maru's Mission (GB)
- Marvel Avengers: Battle for Earth (Wii U)
- Marvel Nemesis: Rise of the Imperfects (DS)
- Marvel Pinball 3D (3DS eShop)
- Marvel Super Hero Squad: The Infinity Gauntlet (3DS)
- Marvel Ultimate Alliance 2 (Wii)
- Marvel Ultimate Alliance 3: The Black Order (Switch)
- Marvel: Ultimate Alliance (Wii)
- Masked Forces (Wii U eShop)
- Masquerada: Songs and Shadows (Switch eShop)
- Mass Effect 3 (Wii U)
- Master of Illusion Express: Deep Psyche (DSiWare)
- Master of Illusion Express: Funny Face (DSiWare)
- Master of Illusion Express: Mind Probe (DSiWare)
- Master of Illusion Express: Shuffle Games (DSiWare)
- Master Reboot (Wii U eShop)
- Masters of Anima (Switch eShop)
- Masyu by Nikoli (3DS eShop)
- Match Up! (DSiWare)
- Matthias Sammer Soccer (GB)
- Maui Mallard in Cold Shadow (GB)
- Max (GB)
- Max & the Magic Marker (WiiWare)
- Max & The Magic Marker (DS)
- Max: The Curse of Brotherhood (Switch eShop)
- May's Mystery: Forbidden Memories (DS)
- Mayhem in Monsterland (C64)
- Maze (Wii U eShop)
- Maze Break (Wii U eShop)
- MDK2 (WiiWare)
- Me & My Furry Patients 3D (3DS eShop)
- Me & My Pets 3D (3DS eShop)
- Me and My Dogs: Friends Forever (DSiWare)
- Mech Rage (Switch eShop)
- Mecha Storm (Switch eShop)
- MechaNika (Switch eShop)
- MechAssault: Phantom War (DS)
- Mecho Tales (Switch eShop)
- Mecho Wars: Desert Ashes (Switch eShop)
- Mechstermination Force (Switch eShop)
- Medabots AX: Metabee & Rokusho (GBA)
- Medabots: Metabee & Rokusho (GBA)
- Medal of Honor: Heroes 2 (Wii)
- Medal of Honor: Vanguard (Wii)
- Medieval Games (Wii)
- Mega Mall Story (Switch eShop)
- Mega Man (NES)
- Mega Man & Bass (GBA)
- Mega Man 10 (WiiWare)
- Mega Man 11 (Switch)
- Mega Man 2 (NES)
- Mega Man 3 (NES)
- Mega Man 4 (NES)
- Mega Man 5 (NES)
- Mega Man 6 (NES)
- Mega Man 7 (SNES)
- Mega Man 9 (WiiWare)
- Mega Man Anniversary Collection (GCN)
- Mega Man Battle Chip Challenge (GBA)
- Mega Man Battle Network (GBA)
- Mega Man Battle Network 2 (GBA)
- Mega Man Battle Network 3 Blue & White (GBA)
- Mega Man Battle Network 4 Red Sun & Blue Moon (GBA)
- Mega Man Battle Network 5: Team Colonel & Protoman (GBA)
- Mega Man Battle Network 6: Cybeast Falzar / Gregar (GBA)
- Mega Man II (GB)
- Mega Man III (GB)
- Mega Man IV (GB)
- Mega Man Legacy Collection (3DS)
- Mega Man Legacy Collection (Switch eShop)
- Mega Man Legacy Collection 2 (Switch eShop)
- Mega Man Legends 3 (3DS)
- Mega Man Legends 3: Prototype Version (3DS eShop)
- Mega Man Star Force (DS)
- Mega Man V (GB)
- Mega Man X (SNES)
- Mega Man X Collection (GCN)
- Mega Man X Legacy Collection (Switch eShop)
- Mega Man X Legacy Collection 2 (Switch eShop)
- Mega Man X2 (SNES)
- Mega Man X3 (SNES)
- Mega Man Xtreme (GBC)
- Mega Man Xtreme 2 (GBC)
- Mega Man Zero (GBA)
- Mega Man Zero 2 (GBA)
- Mega Man Zero 3 (GBA)
- Mega Man Zero 4 (GBA)
- Mega Man Zero Collection (DS)
- Mega Man ZX (DS)
- Mega Man ZX Advent (DS)
- Mega Man: Dr. Wily's Revenge (GB)
- Mega Maze (Wii U eShop)
- Mega Turrican (MD)
- Mega Win Casino Slots (Wii U eShop)
- Mega Words (DSiWare)
- Megalit (GB)
- Megaton Musashi (3DS)
- Megaton Rainfall (Switch eShop)
- Mekazoo (Wii U eShop)
- Membrane (Switch eShop)
- Meme Run (Wii U eShop)
- Memorrha (Switch eShop)
- Mentori Puzzle (Switch eShop)
- Mercenaries Saga 2: Order Of The Silver Eagle (3DS eShop)
- Mercenaries Saga 3 (3DS eShop)
- Mercenaries Saga Chronicles (Switch eShop)
- Mercenaries Wings: The False Phoenix (Switch eShop)
- Mercenary Force (GB)
- Mercenary Kings Reloaded (Switch eShop)
- Merchants of Kaidan (Switch eShop)
- Mercury Meltdown Revolution (Wii)
- Mercury Race (Switch eShop)
- Mes Comptines (3DS eShop)
- Metagal (Switch eShop)
- Metal Gear (NES)
- Metal Gear Solid (GBC)
- Metal Gear Solid: Snake Eater 3D (3DS)
- Metal Gear Solid: The Twin Snakes (GCN)
- Metal Marines (SNES)
- Metal Masters (GB)
- Metal Slug (Neo Geo)
- Metal Slug 2 (Neo Geo)
- Metal Slug 3 (Neo Geo)
- Metal Slug 4 (Neo Geo)
- Metal Slug 5 (Neo Geo)
- Metal Slug 7 (DS)
- Metal Slug Anthology (Wii)
- Metal Slug X (Neo Geo)
- Metal Torrent (DSiWare)
- Meteos (DS)
- Meteos: Disney Magic (DS)
- Metroid (NES)
- Metroid Fusion (GBA)
- Metroid II: Return of Samus (GB)
- Metroid Prime (GCN)
- Metroid Prime 2: Echoes (GCN)
- Metroid Prime 3: Corruption (Wii)
- Metroid Prime 4 (Switch)
- Metroid Prime Pinball (DS)
- Metroid Prime Trilogy (Wii)
- Metroid Prime: Blast Ball (3DS)
- Metroid Prime: Federation Force (3DS)
- Metroid Prime: Hunters (DS)
- Metroid: Other M (Wii)
- Metroid: Samus Returns (3DS)
- Metroid: Zero Mission (GBA)
- Metropolis: Lux Obscura (Switch eShop)
- Miami Crisis (DS)
- Miami Nights: Life in the Spotlight (DSiWare)
- Michael Jackson: The Experience (Wii)
- Michael Jackson: The Experience 3D (3DS)
- Mickey Mania (SNES)
- Mickey Mouse: Magic Wands! (GB)
- Mickey Mousecapade (NES)
- Mickey's Dangerous Chase (GB)
- Mickey's Speedway USA (N64)
- Mickey's Ultimate Challenge (GB)
- Micro Machines (GB)
- Micro Machines 2: Turbo Tournament (GB)
- Micro Machines 64 Turbo (N64)
- Micro Machines v4 (DS)
- Midnight (Wii U eShop)
- Midnight 2 (Wii U eShop)
- Midnight Bowling (WiiWare)
- Midnight Caravan (Switch eShop)
- Midnight Deluxe (Switch eShop)
- Midnight Mysteries: The Edgar Allan Poe Conspiracy (DS)
- Midnight Pool (WiiWare)
- Midtown Crazy Race (Wii U eShop)
- Midway Arcade Treasures (GCN)
- Midway Arcade Treasures 2 (GCN)
- Miffy's World (WiiWare)
- Might and Magic: Clash of Heroes (DS)
- Mighty Bomb Jack (NES)
- Mighty Final Fight (NES)
- Mighty Flip Champs! (DSiWare)
- Mighty Gunvolt (3DS eShop)
- Mighty Gunvolt Burst (Switch eShop)
- Mighty Gunvolt Burst (3DS eShop)
- Mighty Milky Way (DSiWare)
- Mighty Morphin Power Rangers (SNES)
- Mighty Morphin Power Rangers (GB)
- Mighty Morphin Power Rangers: The Movie (GB)
- Mighty No. 9 (Wii U)
- Mighty No. 9 (3DS)
- Mighty Switch Force! (3DS eShop)
- Mighty Switch Force! 2 (3DS eShop)
- Mighty Switch Force! 2 (Wii U eShop)
- Mighty Switch Force: Hyper Drive Edition (Wii U eShop)
- Miitomo (Mobile)
- Miitopia (3DS)
- Mike the Knight and The Great Gallop (3DS)
- Miko Mole (Wii U eShop)
- MikroGame: Rotator (Wii U eShop)
- Milanoir (Switch eShop)
- Miles & Kilo (Switch eShop)
- Military Madness (TG-16)
- Military Madness: Nectaris (WiiWare)
- Millie (Switch eShop)
- Milon's Secret Castle (NES)
- Milon's Secret Castle (GB)
- Mimic Hunter (Switch eShop)
- Mimpi Dreams (Switch eShop)
- Mind Labyrinth (Wii U eShop)
- MIND: Path to Thalamus (Switch eShop)
- Mindball Play (Switch eShop)
- MindFeud (3DS eShop)
- Minecraft (Switch)
- Minecraft: New Nintendo 3DS Edition (New 3DS)
- Minecraft: Nintendo Switch Edition (Switch eShop)
- Minecraft: Story Mode - Episode 1: The Order of the Stone (Wii U eShop)
- Minecraft: Story Mode - Episodes 2-5 (Wii U eShop)
- Minecraft: Story Mode - Season Two (Switch)
- Minecraft: Story Mode - The Complete Adventure (Wii U)
- Minecraft: Story Mode - The Complete Adventure (Switch)
- Minecraft: Wii U Edition (Wii U eShop)
- Minefield (Switch eShop)
- Mineko's Night Market (Switch eShop)
- Miner 2049er (GB)
- Minesweeper Genius (Switch eShop)
- Mini Golf Resort (3DS eShop)
- Mini Mario & Friends: amiibo Challenge (Wii U eShop)
- Mini Mario & Friends: amiibo Challenge (3DS eShop)
- Mini Metro (Switch eShop)
- Mini Ninjas (Wii)
- Mini Ninjas (DS)
- Mini RC Rally (DS)
- Mini Sports Collection (3DS eShop)
- Mini-Games Madness Volume: #1 - Hello World! (Wii U eShop)
- Minit (Switch eShop)
- Minon: Everyday Hero (Wii)
- Miracle Piano Teaching System (NES)
- Mischief Makers (N64)
- Miss Spider - Harvest Time Hop and Fly (DS)
- Missile Command (GB)
- Mission: Impossible (N64)
- Missy Mila: Twisted Tales (DSiWare)
- Mister Bumblebee Racing Champion (WiiWare)
- Mitsurugi Kamui Hikae (Switch eShop)
- Mix Superstar (WiiWare)
- Mixed Messages (DSiWare)
- Moai VI: Unexpected Guests (Switch eShop)
- Moco Moco Friends (3DS)
- Model Academy (DSiWare)
- Modern Combat Blackout (Switch eShop)
- Modern Tales: Age of Invention (Switch eShop)
- Moero Chronicle Hyper (Switch eShop)
- Moero! Nekketsu Rhythm Damashii Osu! Tatakae! Ouendan 2 (DS)
- Moke Moke (DSiWare)
- Moki Moki (WiiWare)
- Mole Mania (GB)
- Molly Maggot (Wii U eShop)
- Mom Hid My Game! (Switch eShop)
- Mom Hid My Game! (3DS eShop)
- Momodora: Reverie Under the Moonlight (Switch eShop)
- Momonga Pinball Adventures (Wii U eShop)
- Momonga Pinball Adventures (Switch eShop)
- Mon Premier Karaoké (Wii U eShop)
- Money Puzzle Exchanger (Neo Geo)
- Monica e a Guarda dos Coelhos (Switch eShop)
- Monkey King: Master of the Clouds (Switch eShop)
- Monkey Pirates (Wii U eShop)
- Monkey Wall (Switch eShop)
- Monochrome Racing (WiiWare)
- Mononoke Forest (3DS eShop)
- Monopoly (Wii)
- Monopoly (GB)
- Monopoly for Nintendo Switch (Switch)
- Monopoly Streets (Wii)
- Monopoly, Boggle, Yahtzee, Battleship (DS)
- Monster 4X4 World Circuit (Wii)
- Monster Boy and the Cursed Kingdom (Switch)
- Monster Buster Club (DSiWare)
- Monster Combine TD (3DS eShop)
- Monster Dynamite (Switch eShop)
- Monster Energy Supercross - The Official Videogame (Switch)
- Monster Energy Supercross - The Official Videogame 2 (Switch)
- Monster High: 13 Wishes (Wii U)
- Monster High: 13 Wishes (3DS)
- Monster High: New Ghoul in School (Wii U)
- Monster High: New Ghoul in School (3DS)
- Monster High: Skultimate Roller Maze (3DS)
- Monster House (GCN)
- Monster House (DS)
- Monster Hunter 3 (Tri~) (Wii)
- Monster Hunter 3 G (3DS)
- Monster Hunter 3 Ultimate (Wii U)
- Monster Hunter 3 Ultimate (3DS)
- Monster Hunter 4 (3DS)
- Monster Hunter 4 Ultimate (3DS)
- Monster Hunter Diary: Poka Poka Palico Village DX (3DS)
- Monster Hunter Frontier G (Wii U)
- Monster Hunter Generations (3DS)
- Monster Hunter Generations Ultimate (Switch)
- Monster Hunter Stories (3DS)
- Monster Hunter X (Cross) (3DS)
- Monster Hunter XX (Switch)
- Monster Hunter XX (Double Cross) (3DS)
- Monster Jam (Wii)
- Monster Jam: Crush It! (Switch)
- Monster Lab (Wii)
- Monster Lair (TG-16)
- Monster Loves You (Switch eShop)
- Monster Max (GB)
- Monster Party (NES)
- Monster Rancher DS (DS)
- Monster Shooter (3DS eShop)
- Monster Slayers (Switch eShop)
- Monster Strike 3DS (3DS)
- Monster Tale (DS)
- Monster Truck Wars (GB)
- Monster World IV (MD)
- Montezuma's Return (GB)
- Monument Builders Rushmore (Switch eShop)
- Moon (DS)
- Moon Chronicles: Episode 1 (3DS eShop)
- Moon Chronicles: Episodes 2-4 (3DS eShop)
- Moon Hunters (Switch eShop)
- Moonfall Ultimate (Switch eShop)
- Moonlighter (Switch)
- Moorhuhn Knights & Castles (Switch eShop)
- Moorhuhn Remake (Switch eShop)
- Moorhuhn Wanted (Switch eShop)
- MOP: Operation Cleanup (Wii U eShop)
- Mordheim: Warband Skirmish (Switch eShop)
- More Brain Training: How Old Is Your Brain? (DS)
- Morphies Law (Switch eShop)
- Morphite (Switch eShop)
- Mortal Kombat (GB)
- Mortal Kombat & Mortal Kombat II (GB)
- Mortal Kombat 11 (Switch)
- Mortal Kombat 3 (GB)
- Mortal Kombat II (GB)
- Mortal Kombat: Armageddon (Wii)
- Mortar Melon (Wii U eShop)
- Mosaic (Switch eShop)
- Moshi Monsters Moshlings Theme Park (3DS)
- Moshi Monsters: Katsuma Unleashed (3DS)
- Mother (NES)
- Mother 3 (GBA)
- Mother Russia Bleeds (Switch eShop)
- Moto eXtreme (DSiWare)
- Moto Racer 4 (Switch)
- Moto Racer DS (DS)
- Moto Roader (TG-16)
- Moto Rush GT (Switch eShop)
- Motocross Maniacs (GB)
- MotoGP (Wii)
- MotoGP 18 (Switch)
- MotoHeroz (WiiWare)
- Motorsport Manager for Nintendo Switch (Switch eShop)
- Mouse House (WiiWare)
- Mouse Trap Hotel (GB)
- MouseCraft (Wii U eShop)
- Move Your Brain: Rollway Puzzle (DSiWare)
- Mr. Chin's Gourmet Paradise (GB)
- Mr. Do! (GB)
- Mr. Driller 2 (GBA)
- Mr. Driller Drill Land (GCN)
- Mr. Driller W (WiiWare)
- Mr. Driller: Drill Spirits (DS)
- Mr. Driller: Drill Till You Drop (DSiWare)
- Mr. Nutz (GB)
- Mr. Pumpkin Adventure (Wii U eShop)
- Mr. Shifty (Switch eShop)
- Ms. Pac-Man (GB)
- Ms. Splosion Man (Switch eShop)
- Muddledash (Switch eShop)
- Mugsters (Switch eShop)
- Muhammad Ali Heavyweight Boxing (GB)
- MUJO (Switch eShop)
- Mulaka (Switch eShop)
- Mulan (GB)
- Mummy Pinball (Switch eShop)
- Munchkin (Switch eShop)
- Muramasa: The Demon Blade (Wii)
- Murder on the Titanic (3DS eShop)
- Muscle March (WiiWare)
- Muse Dash (Switch eShop)
- MUSHA (MD)
- Mushroom Men: Rise of the Fungi (DS)
- Mushroom Men: The Spore Wars (Wii)
- Mushroom Wars 2 (Switch eShop)
- Music On: Acoustic Guitar (DSiWare)
- Music On: Drums (DSiWare)
- Music On: Electric Guitar (DSiWare)
- Music On: Electric Guitar (3DS eShop)
- Music On: Electronic Keyboard (DSiWare)
- Music On: Learning Piano (DSiWare)
- Music On: Learning Piano Volume 2 (DSiWare)
- Music On: Playing Piano (DSiWare)
- Music On: Retro Keyboard (DSiWare)
- Musicverse: Electronic Keyboard (3DS eShop)
- MUSYNX (Switch)
- Mutant Alien Moles of the Dead (Wii U eShop)
- Mutant Football League: Dynasty Edition (Switch)
- Mutant Mudds (3DS eShop)
- Mutant Mudds (Switch eShop)
- Mutant Mudds Collection (Switch eShop)
- Mutant Mudds Deluxe (Wii U eShop)
- Mutant Mudds Super Challenge (Wii U eShop)
- Mutant Mudds Super Challenge (3DS eShop)
- Mutant Year Zero: Road to Eden (Switch)
- Mutation Nation (Neo Geo)
- MXGP 3 (Switch)
- My Aquarium (WiiWare)
- My Aquarium 2 (WiiWare)
- My Aquarium: Seven Oceans (DSiWare)
- My Arctic Farm (Wii U eShop)
- My Arctic Farm 2018 (Switch eShop)
- My Asian Farm (DSiWare)
- My Australian Farm (DSiWare)
- My Baby Pet Hotel 3D (3DS eShop)
- My Brother Rabbit (Switch eShop)
- My Dolphin (WiiWare)
- My Exotic Farm (DSiWare)
- My Exotic Farm (3DS)
- My Exotic Farm (Wii U eShop)
- My Exotic Farm 2018 (Switch eShop)
- My Farm (DSiWare)
- My Farm (Wii U eShop)
- My Farm (Switch eShop)
- My Farm 3D (3DS eShop)
- My First Songs (Wii U eShop)
- My First Songs (3DS eShop)
- My First Songs 2 (3DS eShop)
- My Foal 3D (3DS)
- My Friend Pedro (Switch eShop)
- My Girlfriend is a Mermaid?! (Switch eShop)
- My Health Coach: Weight Management (DS)
- My Hero One's Justice (Switch)
- My Horse and Me (Wii)
- My Horse and Me 2 (Wii)
- My Jurassic Farm (Wii U eShop)
- My Jurassic Farm 2018 (Switch eShop)
- My Life on a Farm 3D (3DS eShop)
- My Little Baby (WiiWare)
- My Little Baby 3D (3DS)
- My Little Restaurant (DSiWare)
- My Little Riding Champion (Switch)
- My Memory of Us (Switch eShop)
- My Nintendo Picross: The Legend of Zelda: Twilight Princess (3DS eShop)
- My Pet School 3D (3DS eShop)
- My Pets (3DS eShop)
- My Pokémon Ranch (WiiWare)
- My Riding Stables - Life with Horses (Switch eShop)
- My Riding Stables 3D - Jumping for the Team (3DS)
- My Starry Night (WiiWare)
- My Style Studio: Hair Salon (Wii U eShop)
- My Style Studio: Hair Salon (3DS eShop)
- My Style Studio: Notebook (Wii U eShop)
- My Time at Portia (Switch)
- My Vet Practice 3D - In the Country (3DS)
- My Western Horse 3D (3DS)
- My Zoo (WiiWare)
- My Zoo Vet Practice 3D (3DS eShop)
- myDiary (DSiWare)
- myNotebook (DSiWare)
- myNotebook: Carbon, Pearl and Tan (DSiWare)
- myPostcards (DSiWare)
- MySims (Wii)
- MySims (DS)
- MySims Agents (Wii)
- MySims Camera (DSiWare)
- MySims Kingdom (Wii)
- MySims Party (Wii)
- MySims Party (DS)
- MySims Racing (Wii)
- Myst (3DS)
- Mysterious Stars 3D: A Fairy Tale (3DS eShop)
- Mysterious Stars 3D: Road to Idol (3DS eShop)
- Mysterious Stars: A Fairy Tale (DSiWare)
- Mysterious Stars: The Samurai (DSiWare)
- Mysterious Stars: The Singer (DSiWare)
- Mysterium (GB)
- Mystery Case Files: Dire Grove (3DS eShop)
- Mystery Case Files: MillionHeir (DS)
- Mystery Case Files: Ravenhearst (3DS)
- Mystery Case Files: Return to Ravenhearst (3DS eShop)
- Mystery Case Files: The Malgrave Incident (Wii)
- Mystery Dungeon: Shiren the Wanderer (DS)
- Mystery Murders: Jack the Ripper (3DS eShop)
- Mystery Murders: The Sleeping Palace (3DS eShop)
- Mystical Ninja Starring Goemon (N64)
- Mystical Ninja Starring Goemon (GB)