These mysterious Pokémon evolve when they receive electrical stimulation while they are in the same place as Shelmet.
– Pokemon Black Pokedex
Rawwrrr!! That’s what Karrablast seems to be saying. It also sort of looks like a toddler in those one-piece outfits. What I noticed from Pokedex 3D is that its face is really really flat.
Karrablast evolves into Escavalier by trading with a Shelmet. This is a new evolution gimmick introduced in Gen V, so Karrablast and Shelmet are the only Pokemon that evolve by requiring trade with a specific Pokemon. I think because of the trade evolution, some DNA of Karrablast and Shelmet got mixed up, because Escavalier’s shell resemble’s Shelmet’s (though the inside body still is blue like Karrablast). Or maybe it’s like when trading, Karrablast stole Shelmet’s shell, because Accelgor is shell-less. I guess it could be because Karrablast is based on a snail-eating beetle apparently, and Shelmet is a snail Pokemon. It’s a pretty weird family alright.
Karrablast’s stat spread is kinda good; it has good Attack and Speed, and low Sp Attack.