Wich Pokemon can learn thief from the move maniac in fire red?

You can't teach Thief to any Pokémon via the Move Maniac in Fire Red. This is because Thief is a move that's only learned by specific Pokémon through leveling up or through a move tutor.

Here are the Pokémon in Fire Red that can learn Thief:

* Tauros: Learns Thief at level 33.

* Gengar: Learns Thief at level 39.

* Persian: Learns Thief at level 34.

* Sneasel: Learns Thief at level 47.

* Weavile: Learns Thief at level 1.

While the Move Maniac does provide a way for Pokémon to learn a wide variety of moves, it can't provide all moves, particularly moves that are limited to specific Pokémon.