Arbok
Who needs arms? Arbok doesn’t. As far as style goes, Arbok is a major contender with that design on its body used to spook the hell out of anybody in its way. Despite not having arms, Arbok could add even more variety to the roster through the mere concept of being a snake. Arbok, like many actual constrictors, can coil around enemies, except without strangling them to death. That wouldn’t be good for business in the Pokémon world.
The idea of this sort of close quarters combat could make Arbok a very interesting character to use, as making one wrong move might mean being trapped in its coil, at the mercy of any way Arbok decides to squeeze or toss the opponent.
To remain consistent with the rest of the game, Arbok could also have its own projectiles through Poison-type moves such as Gastro Acid, spraying toxic bile at enemies, or Glare to stun enemies with that very pattern on its body. Plus, who doesn’t want to be a giant, poisonous cobra, for once in their lives?