It evolves when bathed in an electric-like energy along with Karrablast. The reason is still unknown.
Traits
Weakness
Resistance
Retreat Cost
x2
Moves
$B$U$7$.$J$7$s$+(B Fushigi na Shinka (Mysterious Evolution)
If Karrablast is in play, search your deck for a card that evolves from this Pokémon, and put it onto this Pokémon. (This counts as evolving this Pokémon.) Shuffle your deck afterward.