From Bulbapedia, the community-driven Pokémon encyclopedia.
}' B is a dual type Glitch/normal glitch Pokémon found in Pokémon Yellow. It occupies hexadecimal slot DB and will become Glitch (DB) if traded to Red and Blue. }' B's sprite will eventually crash the game. It shares that trait with two other glitch Pokémon 4 4 and 8B 4 8. It evolves into 3TrainerPoké $ at level 34.