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Aura Sphere is Lucario's neutral special move in the Super Smash Bros. series, starting with Super Smash Bros. Brawl. Pressing the special button will cause Lucario to begin charging his Aura energy into a ball, and then release it in front of him by pressing the button again. While charging it, the sphere deals small damage to opponents who touch it. Once it is fully charged, Lucario can immediately release it or hold it for later by rolling to the side or shielding. Fully-charged shots fly perfectly straight, while shots that are less charged move in a wavy pattern. A fully-charged Aura Sphere travels farther and deals more damaged than an uncharged Aura Sphere.
The move has two variants: Snaring Aura Sphere and Piercing Aura Sphere. Snaring Aura Sphere flies much slower than the regular Aura Sphere, but it also drags opponents closer to it after being shot. It also travels farther the less it has been charged. Piercing Aura Sphere charges faster and travels farther and faster than the regular Aura Sphere, as well as pierces through enemies and other projectiles, but it is much weaker and deals less knockback.