Arrow of Light
The Arrow of Light is the ultimate weapon for Pit, being one of the Three Sacred Treasures. It's an unstoppable beam of light that pierces through everything in its way, enemy or object alike. The downside is that Pit can only launch one arrow at a time; he cannot fire again until the previous arrow has disappeared.
Appearances
Kid Icarus
This mighty weapon is sealed in a Sacred Casket until Pit assembles all three treasures. In the Palace in the Sky, Pit can blaze his way through Medusa's remaining troops. Its strength is equal to Pit's strength.
Kid Icarus: Of Myths and Monsters
The Arrow of Light is functionally identical to its first incarnation.
Kid Icarus: Uprising
Palutena's Arrow from Super Smash Bros. Brawl returns in Uprising. The arrow will also curve, but likely automated. It means that it will follow the nearest target or follow the targeted foes.
Super Smash Bros. Brawl
Pit's Arrow of Light makes a comeback with this long, quick, laser-like projectile, now called Palutena's Arrow. It can be curved in mid-flight to attack mobile foes (though particularly agile ones can avoid easily). The weapon itself, like most projectiles, is not particularly strong; it also lacks in knock-out power. The bolt has lost its ability to pierce targets, in the interest of balance.