Thus far, Hyper Sonic's only appearance is in Sonic the Hedgehog 3 & Knuckles. In the game, Hyper Sonic looks very similar to Super Sonic, sharing the same body proportions and upturned head spikes. However, Hyper Sonic flashes in all seven colors of the Chaos/Super Emeralds and has large flashing sparks (similar to the Invincibility item) floating around him. Also, when moving, he leaves several after-images.
Powers and abilities
Hyper Sonic has all of Super Sonic's abilities, such as invincibility to all attacks, improved speed and strength, and greater jumping abilities. Since Hyper Sonic is generally an upgraded version of Super Sonic, it can be assumed that all of Hyper Sonic's physical abilities surpass that of Super Sonic's. Hyper Sonic also has some new and improved abilities: while Super Sonic is near invulnerable, Hyper Sonic is completely invulnerable towards physical harm from attacks and the environment. He also can breathe underwater and has the added ability of a devastating lightning attack. This can be used to "double jump" in any direction and, when performed, destroys all enemies on-screen (except bosses) with a bright flash.
As with all Chaos Emerald/Super Emerald-caused transformations, once Hyper Sonic runs out of Rings, his transformation will end and will revert back to normal.
Hyper Sonic's name comes from the term hypersonic, which is a speed above supersonic (which is defined as any speed Mach 5 or greater than it).
Hyper Sonic's double jump ability can somehow force him to enter a Bonus Stage without jumping into the ring of stars.
Curiously, when Sonic is Hyper Sonic, certain objects glow multiple colors like him, such as Flickies, and Level boxes.
In Launch Base Zone Act 2, if Sonic transforms into either Super or Hyper Sonic underwater, then he will have a color scheme similar to Shadow the Hedgehog for one of the frames of his transformation.
Like Tails and Knuckles, if the player turns into Hyper Sonic with S in Debug Mode when the level ends, and quickly turn back into a box, the word Sonic in "Sonic Got Through Act 1/2" turns into Hyper Sonic's colors.