Xurkitree

Xurkitree (also known by its code name UB-03 Lighting) is an Electric-type Pokémon, more specifically an Ultra Beast. It originates from Ultra Space (specifically the Ultra Plant), but has been sighted in the Alola region as well (and even the Max Lair in the Galar region) due to traveling through Ultra Wormholes. It raided a power plant, so people think it energizes itself with electricity. Astonishing electric shocks emanate from its entire body. Some of them stand unmoving, like trees, with their arms and legs stuck into the ground.