Sonic Adventure 2: In this game, Super Sonic is mostly the same as his Sonic Adventure appearance, except he is a metallic gold color, but his aura stays yellow. The spikes on his back also do not change size, but are lifted up a bit, making him look identical to Shadow. This is the last main series 3D Sonic game where this appearance is seen, as all other ones after have Super Sonic's cranial quills turned completely upwards. Super Sonic (スーパーソニック, Sūpā Sonikku?) is the Super State of Sonic the Hedgehog that can be activated through collecting all seven Chaos Emeralds and usually fifty rings. In the 2D games, he plays like Sonic, but can jump higher, is faster, and is invincible. Nevertheless, he could still drown, die by falling off screen or get crushed against a wall. In his first appearance, Sonic the Hedgehog 2, Super Sonic bears no impact on the game's story, but would give the good ending if achieved. However, from Sonic 3 & Knuckles onward, he usually has a greater impact on the story and is often part of the ending, or secret ending. Sonic also has an extended form of Super Sonic known as Hyper Sonic, which was only used in Sonic 3 and Knuckles.
With the power of the seven Chaos Emeralds, Super Sonic is one of the most powerful beings seen in the Sonic the Hedgehog series, having been able to fight and defeat fearsome monsters, titanic robots and even beings that are considered deities. As Super Sonic, Sonic gains the ability to fly and is virtually invulnerable to all harm, except for the attacks from the most powerful characters in the series such as Solaris, Perfect Dark Gaia and the Egg Salamander. All of his innate strengths and abilities are also enhanced far beyond his normal ones in this form; his trademark speed has been increased tremendously, nearing the speed of light, he can jump much higher than usual, and he has improved reflexes to match his improved movements. His physical strength is also increased vastly, allowing him to smash through large robots, barriers and Dr. Eggman’s space armada with ease as shown in Sonic Unleashed, break enormous metal restraints without effort, and even stun Perfect Dark Gaia whose size is on a par with a continent. He also possesses the ability to freely perform several Chaos Powers, such as Chaos Control, create shields that can deflect the enemy’s attacks, and unleash waves of destructive golden energy (as seen in his battle against Super Ix). However, he rarely uses these powers unless absolutely necessary, and relies more on his speed and strength to defeat his enemies.
In this form, Super Sonic's trademark attack is the Super Sonic Boost, an attack where he cloaks himself in a fiery aura and launches himself into the enemy at increased speed, and is able to perform this boost for an unlimited time. Alternately, he can use this attack to launch the enemy's projectiles back at themselves, or protect himself from harm by boosting through attacks. In his many battles, Super Sonic has demonstrated several variants of the Super Sonic Boost; During his confrontation with Solaris, Super Sonic demonstrated the Arrow of Light, a move where he absorbs the surrounding (blue) light into his body and charges directly into Solaris. He also possesses an attack called "Sonic Rumble", where he is flying directly into the enemy for thereafter to make a hasty retreat. He can also perform smaller dashes, in order to perform shorter, but more precise movements that can evade the enemy's attacks.
As demonstrated in his battle against Perfect Chaos, the positive energy which empowers Super Sonic is able to neutralize the negative energy which Perfect Chaos had absorbed and, at the same time, purify him of all his anger and rage.
As shown in most games, especially during the final boss battles, Super Sonic's weakness is that he relies on ring energy to maintain his super transformation, which is a common trait among Chaos Emerald-caused super transformations. Once Super Sonic runs out of rings, he will revert back to his normal form. In the actual story canon, Sonic only needs to use the power of the seven Chaos Emeralds to turn into Super Sonic. He doesn't need to collect fifty rings to trigger the transformation because, for most games after Sonic Adventure, he automatically starts with them. The rings slowly deplete as they sustain the super form as a game mechanic. Once Super Sonic is out of rings, he will revert back to Sonic. Though, it is possible for Sonic to indefinitely hold his transformation -- in Sonic Advance, he kept it for almost a week. One theory is that Super Sonic does not use rings and can maintain the form, yet in gameplay when he is fighting in the harsh extreme environments he fights in, he is using more energy and might need rings to conserve it, thus the depleting ring count. Also, Sonic is often not exactly invincible, as taking a hit would throw him back(along with other super forms) without him losing any rings, but later games as of Super Smash Bros. Brawl have (re)tweaked him to become completely invincible(save for pits and certain hazards regarding pits of course.) In the MegaDrive/Genesis games that Super Sonic appeared in, he could only be activated by first collecting all seven Chaos Emeralds from the Special Stages. If this condition was met, Sonic could simply transform into Super Sonic by double tapping jump, as long as he had at least fifty rings. Below are the conditions required to use Super Sonic outside of the MegaDrive/Genesis era of games.
The Chaos Emeralds are earned after beating the bosses, rivals and for restoring Planet Wisp. Like in Sonic Heroes, the player needs to collect all the Chaos Emeralds in order to reach the final boss, who the player fight as Classic Super Sonic and Modern Super Sonic. Once the final boss is defeated, the player earns the Super Sonic skill, which costs all 100 points to equip and can be equipped to both Classic Sonic and Modern Sonic. When equipped, Sonic needs to collect 50 rings and press Y/Triangle to transform. Both Super Sonics gain the upgrades and limitations featured in the previous games, such as invincibility, quicker acceleration, a higher jump, and the ring drain. However, the transformation drains rings now at a rate of two per second compared to previous games' one, effectively halving the time Super Sonic may stay transformed. Modern Super Sonic, as well as the aforementioned characteristics, retains the infinite boost from Sonic Colors. However, in an area where progression is linear, activating the Boost will cause him to fly on the fastest route to the end of the level. Using this Boost will drain rings at a substantially faster rate though, a trait somewhat similar to Super Sonic's iteration in Sonic Riders: Zero Gravity and Sonic Free Riders. Unlike his iteration in Sonic Colors, it is possible to use Wisp powers with Super Sonic enabled in this game, although use of a Wisp Power will automatically de-transform Super Sonic to his normal form. If (normal) Sonic, has 50 or more rings, but has a Wisp Power, the Wisp Power will be activated first.
The 3DS version requires the player to obtain all 7 Chaos Emeralds from the Special Stages. Super Sonic is only available in the Time Eater fight in this version. The fight is unlocked once all other stages are cleared and the Emeralds obtained.