Spectral Thief

Damage class	Physical	Type	GHOST	Target	Single target
Power	90	Accuracy	100	PP	10
Priority	0	Additional effect chance			0%
Additional effect description		Spectral Thief

In-game description

The user hides in the target's shadow, steals the target's stat boosts, and then attacks.

Pokémon	Methods
Marshadow	Level 45
Marshadow (Dev Form)	Level 45