Though it differs from other Basculin in several respects, including demeanor—this one is gentle—I have categorized it as a regional form given the vast array of shared qualities.
Basculin is a Water-type Pokémon. It takes double damage from Electric and Grass, and resists Fire, Water, Ice and Steel. Its base stats add up to 460: the highest is Speed (98) and the lowest is Special Defense (55).
It is the first stage of its evolution line, along with Basculegion. Its abilities are Reckless and Adaptability, and its Hidden Ability is Mold Breaker. It is in the Water 2 egg group and can breed with 35 species. In Scarlet and Violet it learns 16 moves by level-up and 37 by TM.
OTHER FORMS
Basculin Blue-Striped Form
Water type, like Basculin; the same stats as Basculin; abilities Rock Head, Adaptability, Mold Breaker (hidden).
Basculin White-Striped Form
Water type, like Basculin; the same stats as Basculin; abilities Rattled, Adaptability, Mold Breaker (hidden).
BASE STATS
ABILITIES
Powers up moves that have recoil damage.
Powers up moves of the same type as the Pokémon.
The Pokémon's moves are unimpeded by the Ability of the target.