Basculin is a Water-type region-exclusive Pokémon from the Unova region. It does not evolve into nor from any other Pokémon. Red-Striped form is available in Eastern hemisphere while Blue-Striped form is available in Western hemisphere.
Basculin - Hostile Pokémon
When a school of Basculin appears in a lake, everything else disappears, except for Corphish and Crawdaunt. That's how violent Basculin are.