Nintendo goes through a lot of concepts and projects that don't, in the end, become a full game. While that's normal, it can be fascinating to learn about some of the games or ideas that never made it to our systems, with a recent example being that Captain Toad: Treasure Tracker evolved from a Legend of Zelda concept.

That's one project included in the latest Mario-related video from the Did You Know Gaming YouTube channel. We share these videos from time to time as they often include some entertaining Nintendo trivia, both familiar and lesser known. The episode below covers Mario concepts and ideas that were held back due to system limitations, or others that were just outright rejected; we quite like the sound of Super Mario Spikers from Next Level Games, as volleyball blended with wrestling sounds too bonkers to resist.

Check it out below and let us know what you think.