I thought there wasn't anything, but then I remember one game that I returned back on the SNES. Frantic Flea... a game that my parents and I could NOT figure out how to play.
Thankfully the Wal-Mart employees were nice and let us trade it even though they weren't supposed to, and we got Legend of Zelda: Link's Awakening on the Game Boy instead... best trade ever.
I also took back Super Mario 64, but that's because my cartridge was glitched and wouldn't save... sadly, at the time, Super Mario 64 was so popular that I couldn't get another copy of that, so I got Bomberman 64 instead... Not as good, but I had fun with it as a kid.