It appeared from an Ultra Wormhole. Each one appears to be made up of many life-forms stacked one on top of each other.
Base Exp. 0
Height 5.5m
Weight 820kg
#805 - Stakataka
Rock Steel
Stats
HP 61 / 255
Attack 131 / 181
Defense 211 / 230
Sp. Atk. 53 / 173
Sp. Def. 101 / 230
Speed 13 / 200