Info

Wailord is a massive water-type whale Pokémon. Despite his enormous size (height of 14.8m), his body has miniscule density. If we do the math, his body has ~7700m³ in volume. Given his weight of 398kg, that makes his density ~0.05kg/m³. For comparison, helium has a density of 0.166kg/m³. This means that Wailord can fly. He feeds on various small sea Pokémon, like Wishiwashi.

Predators

Wailord's only predator is Dhelmise, who hunts Wailords and feeds off their life force.
Dhelmise is an ugly boat anchor that should be wiped off the face of the Earth.

Evolution

Wailord evolves from Wailmer at level 40. This is probably the biggest upgrade in the history of upgrades, maybe ever.