Basculin

It looks like a schooling fish, but its social life is closer to territorial warfare than to a peaceful shoal. Red-Striped and Blue-Striped specimens fight over space, although they sometimes mix. Pokédex entries also describe it as a fierce animal, highly valued as food and capable of driving other Pokémon out of the lakes where it settles.

Its body resembles a freshwater predatory fish, and its jaws reinforce that impression. The three forms—Red-Striped, Blue-Striped, and White-Striped—are distinguished by their color patterns, but they do not change its Water typing. The White-Striped Form also has a different fate: it is the only one that can continue the evolutionary line and become Basculegion. The other two remain Basculin.

It debuted in the fifth generation, as part of Unova’s wildlife. Its opposing colors fit the aggressive behavior repeated in its descriptions: this is not an ornamental fish, but a species that turns every shoal into a constant dispute.

It is not a common competitive choice. Its spread is offensive, with 92 Attack and 98 Speed, but 70 HP, 65 Defense, and 55 Special Defense leave it little room to switch in repeatedly. Its 80 Special Attack allows it to use Surf or Hydro Pump, although its physical Attack gives it better reasons to use it.

Reckless defines its most aggressive sets: it boosts moves that damage the user. Wave Crash, with 120 power, and Double-Edge, also with 120, take advantage of the ability, but the recoil quickly adds up. Take Down offers a less extreme alternative, while Aqua Jet provides Water-type damage when it needs to finish off a weakened opponent.

The Water type hits Fire, Ground, and Rock effectively, and lets it resist Fire, Water, Ice, and Steel. In return, its weaknesses to Electric and Grass are very easy to exploit, and its low Special Defense limits its ability to switch in against special attackers. In a normal playthrough, it performs best as a fast attacker during the middle portion of the journey, when its Water moves and Ice- or Dark-type coverage have clear targets. Adaptability improves the damage of its Water moves, and Mold Breaker ignores the target’s abilities, but neither solves its frailty.

It belongs to the Water 2 Egg Group and has an even gender ratio: 50% female and 50% male. Its 40 Egg Cycles are equivalent to approximately 10,455 steps. That is a slow hatch time for a species that is otherwise easy to breed.

Its notable Egg Moves include Bubble Beam, which offers a 65-power special Water-type option, and Endeavor, useful when the opponent still has plenty of HP and Basculin has already been weakened. Its level-up movepool also gives it access to recoil moves, a feature tied to its evolution.

It is not especially convenient to catch: a catch rate of 25 puts it in the difficult range, far from species that go into a Poké Ball easily.

Only the White-Striped Form evolves. It must accumulate enough recoil damage from its own moves without being knocked out, then level up afterward; it will then evolve into Basculegion. The Red-Striped and Blue-Striped Forms do not follow that path.