What are all of Sonic the Hedgehog's transformations?

Originally, I know Sonic could go Super Sonic whenever you collected the Chaos Emeralds in most of the Sonic the Hedgehog games. However, I've seen Sonic in quite a few other altered states. An example would be that I saw Sonic with no pupils and two stripes over his head. It would seem that he has gained a few other forms over the years that I'm not quite aware of, so I would like to know what other forms he has besides Super Sonic and what games they originated from. And, if you're feeling loving, maybe give a little description about what the form does.
Best Answer
Sonic also has a Werehog form which was introduced and used in Sonic Unleashed. This form was obtained when Sonic was exposed to Dark Gaia's power which allows him to transform into this form at night in the game.
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Quick Answer about "What are all of Sonic the Hedgehog's transformations?"
- Dark Sonic.
- Excalibur Sonic.
- Super Sonic.
- Darkspine Sonic.
- Werehog Sonic.
- Hyper Sonic.
- Chaos Knuckles.
The (Simplified) Sonic The Hedgehog Timeline | The Leaderboard
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Answer 2
there was also ultra sonic, who was able to change his appearance and abilities depending on where he was. (he turned into solar, polar, and eco sonic) he was also able to change atoms.
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