Tecmo Koei's next Dynasty Warriors game for 3DS, Dynasty Warriors Vs., features some interesting sartorial options for discerning Nintendo fans.
The Japan-only scrapper lets you dress up as Link or Samus in her Zero Suit. They're included on the cart, but you'll have to get far enough in the tutorial mode to unlock them.
Note that these are not the characters themselves, they are simply their outfits.
Your Mii will also pop up from time to time to help out in battle, summoning rampaging elephants and things of that ilk.