Game move errors

In the games, there will, on rare occasions, come up a Pokémon that knows a move it cannot legally learn in any game. It is unknown whether these are actual mistakes or not.

List of in-game Pokémon with moves they can't learn in the games

Sprite	Name	Move	Game	Notes	Picture
	Lance's Dragonite	Barrier	GEN1.1Pokémon Red and Blue	Lance's Dragonite knows Barrier in the Generation I games, although Dragonite cannot legitimately learn this move by any means.
	Lance's Aerodactyl	Rock Slide	GEN1.1Pokémon Red and Blue	Lance's Aerodactyl knows Rock Slide in the Generation I games, although Aerodactyl could not legitimately learn this move until Generation IV.
	Cooltrainer Dianne's Lanturn	Earthquake	GEN3.3Pokémon Emerald	Cooltrainer Dianne's Lanturn knows Earthquake in the Generation I games, although Lanturn cannot legitimately learn this move by any means.
	Aipom	Rock Throw	GEN4.Ranger3Pokemon Ranger: Guardian Signs	Aipom's Poké-Assist in Pokémon Ranger: Guardian Signs is Rock-type and involves throwing rocks, though Aipom cannot legitimately learn Rock Throw by any means.
	Bronzor	Teleport	GEN4.Ranger3Pokemon Ranger: Guardian Signs	Bronzor are capable of teleporting in Pokémon Ranger: Guardian Signs, although Bronzor cannot legitimately learn Teleport by any means.
	Ambipom	Rock Throw	GEN4.Ranger3Pokemon Ranger: Guardian Signs	Ambipom's Poké-Assist in Pokémon Ranger: Guardian Signs is Rock-type and involves throwing rocks, though Ambipom cannot legitimately learn Rock Throw by any means.