Death Battle2010

Wizard:
[after describing Sonic's different shield power-ups] Sonic's ultimate power-up, however, isn't a shield at all. After absorbing thousands of power rings during his adventures, Sonic has become an embodiment of chaos. Using the power of the seven Chaos Emeralds, Sonic can tap into their incredible power and summon the form of Super Sonic.

Boomstick:
Super Sonic can fly, breathe underwater, and is completely invulnerable.

Wizard:
Not to mention his speed is increased a thousand fold.

Boomstick:
But as with most things that are unbelievably powerful, it has a time limit. Without a steady supply of power rings, it can't even last a full minute.

Wizard:
And when the form finally subsides, Sonic returns to normal at peak physical form, regardless of his condition prior to the transformation.