From the Super Mario Wiki
Palutena is the goddess of light and main damsel-in-distress from the Kid Icarus series.
In Super Smash Bros. Brawl, Palutena is featured in Pit's Final Smash, Palutena's Army. Pit calls her forth to assist him in battle, to which she then appears as a giant (not her actual size, but her chosen manifestation for this appearance). She will then summon an army of Centurions to attack Pit's opponents, who attack by dive bombing at incredible speeds.
Palutena is also a supporting character in the The Subspace Emissary. After witnessing the Subspace Bomb's effects, Palutena sends Pit to "This World" to help stop the Subspace Army. She even gives Pit her bow.
 Trophy Information from Super Smash Bros. Brawl