1. He's not mistaken, but insists that he is.
Inty: Error, from Zelda II: The Adventure Of Link. He simply stands in a house and says "I am Error."2. He wasn't published by Nintendo at first, but became a boss character in a Nintendo game. Now he's a good guy again, or at least when he was on TV, with a slightly different name.
Inty: Lolo / Lololo / Fololo, of the Adventure Of Lolo & Kirby series3. This Koopaling's airship has no propellors.
Revned: Wendy O. Koopa, from Super Mario Bros. 34. In the very first mainstream console game to feature force feedback, a special way of defeating it resulted in the largest vibration possible in the game.
Inty: Mechbeth, who is diverted into an arms factory, or some other explosive building, from planet Macbeth in Star Fox 645. What is the name of the character who reports no problems at the beginning of the blatantly-named sixth area of a game?
Inty: Caiman, from "Area 6" of Star Fox 646. What is the name of Miyamoto's dog, both in real life and in a game?
Inty: Pik, as seen in Nintendogs, and Pikmin was named after it7. There are actually more than 386 different species of Pok?mon. Name at least three Pok?mon that are not (or are not yet) numbered.
Inty: Bonsly, Munchlax, Lucario, various Japanese ones, from the most recent Pok?mon games and movies, also technically acceptable: the "glitch Pok?mon": Missingno. and 8. Adult import model Francine Dee has this creature tattooed near her nether regions.
bustin98: Mew, the original "secret Pok?mon"9. Din is to Chattur'gha as Farore is to Xel'lotath and as Nayru is to?
Revned: Ulyaoth, from Eternal Darkness: Sanity's Requiem - other names refer to Zelda goddesses/Oracles and the other Eternal Darkness "Ancients", corresponding by colour10. This Hunter's name is half of the North American title of another Nintendo-published game for the same system.
Inty: Trace, from Metroid Prime: Hunters and the other game is Trace Memory, which has other names in other regionsNo contest here. Inty got 7/10.