Cresselia rarely makes an appearance on the Spear Pillar stage in Super Smash Bros. Brawl, instead of the normal Dialga or Palkia. The bluish hue often associated with Dialga can also mean Cresselia. As Cresselia remains on the stage, she will occasionally do one of two actions: unleash a single, spinning energy blade (most likely Psycho Cut) that erratically moves around the stage, or release a series of Psycho Cut blades from a central point.
As a trophy
Cresslia also appears as a trophy.
A Lunar Pokémon. Cresselia appears on Fullmoon Island and, once discovered, flies around different areas of Sinnoh. Its signature move, Lunar Dance, causes Cresselia to faint but recovers all the HP and cures the status conditions of the next Pokémon its Trainer sends out. Cresselia excels at recovery techniques and is unusual in that it appears only in female form.