7g is a Water/Psychic-type Glitch Pokémon exclusive to Pokémon Yellow. It can only be caught using the third method of the Mew Glitch with a Special stat of 198. Its Pokémon Red and Blue counterpart is LM4. It evolves into TM40, a Charizard hybrid glitch Pokémon, at level 209.
Stub!
Please help the Pokémon Wiki by adding more info.