Nihilego (Lost Thunder LOT 106)

Nihilego — 110 HP — [P]
Basic — Ultra Beast

[P] Nightcap
You can use this attack only if your opponent has exactly 2 Prize cards remaining. Choose 1 of your opponent’s Pokémon’s attacks and use it as this attack.

[P] Void Tentacles
Your opponent’s Active Pokémon is now Confused and Poisoned.

weakness: [P]×2
resistance:
retreat: 1

Illus. Megumi Mizutani
Lost Thunder — 106/214 — Rare Holo

One of the Ultra Beasts, it’s unclear whether or not this Pokemon is sentient, but sometimes it can be observed behaving like a young girl.