i'd say Shadow or Antoine, and they are two i wish i could do it better. I think the one i can do the best is Big, can't complain since i like imitating him, but far from being the favorite. and your's?
-Sonic is over 1000 years old. When Tikal spoke to the Master Emerald in SA1, saying: 'Please, you must stop him!' She was actually summoning the 'essence' of the Master Emerald, which happened to be Super Sonic. Super Sonic defeated Perfect Chaos in an epic battle, but the village was destroyed.
-A weakened, blue version of Super Sonic awoke with no memory centuries later, possibly discovered by Amy or Tails. Whenever Sonic acquires the 7 Emeralds, only then do we see his 'true' form.
-Tikal, having lost everything due to her people's greed and lust for power that the Emeralds gave, used the energy of the Emeralds to send Angel Island into the sky, where no one could reach them. (Bear in mind, this is centuries before the creation of airplanes)
-Gerald searched the world for cures to Maria's disease. In one of his travels, he saw the paintings of Super Sonic etched on the walls of Hidden Palace and heard fables of an 'Ancient Protector' who disappeared in a flash.
-GUN hired Gerald to build a weapon to keep the US as the worlds leading superpower, following the events of World War 2. He was against it, but in exchange, GUN offered to give Maria free, round-the-clock medical care on the germ-free enviroment of the Ark. He couldn't refuse.
-Gerald designed the Eclipse Cannon, a weapon that can strike any country on the planet with pinpoint accuracy. The Cannon required immense energy to function, however. Chaos Emeralds of course, were used. However, Gerald had doubts about the Cannon, fearing the incredible amounts of energy would create a black hole and end all life. He secretly began work on a new project, based on his travels to Hidden Palace: A protector with unstoppable power, but born with a pure heart, and sense of mercy, watching over the people of the planet like a shadow.
-Members of congress found out about the Cannon, and decided it to be too dangerous. They ordered the arrest of Gerald for crimes against humanity. Soldiers stormed the Ark. Maria, fearing they might harm Shadow, fled. In a moment of confusion, a Soldier accidentally fired his weapon, killing her, right as Maria pulled the lever, sending Shadow to Earth.
-Gerald, learning of Maria's fate, leaves behind a video to his Grandson to claim his 'Inheritance' from the bowels of GUN HQ, knowing Shadow will avenge Maria by acquiring the Emeralds.
-In 'my' version of SA2, Biolizard doesn't exist. Shadow acquires the Emeralds and activates the Cannon. As Gerald predicted, A Black Hole forms, threatening to swallow Earth. Having a change of heart, Shadow removes his rings, becoming a red, high powered, flaming version of himself, (In my ideal Sonic Universe, only Sonic has a super form, but Shadow comes close here) He sacrifices himself by flying into the Black Hole, and preforming Chaos Control, causing the Black Hole to close in on itself.
I think part of the reason why Rouge is interested in Knuckles (aside from the Master Emerald and saving her) is because he's an earnest and relatively honest person who is committed to his duty. I get the impression that Rouge probably grew up in/is more used to environments where greed and deception was the norm for her, and she herself chose to be the same because she didn't see any reason why she should bother to be better when it would likely just result in her being taken advantage of. The fact that Knuckles is so committed to doing his duty despite often being back-stabbed, ridiculed, and taken advantage of, and despite how the power of the Master Emerald would have been a source of temptation to commit evil acts might have appealed to her better nature deep down.
here's the US commercial for mcdonalds' 2004 sonic happy meal toy set. NOT the horrible pakistan one. the CGI is way better in this one,about as good as heroes' cutscenes. there's also voice samples from ryan drummond specifically for this commercial too! ("i think you need one of these!" and "i'm lovin' it!")
here's a commercial called "sonic magic" that advertises the genesis/ mega drive model 2. i bet you haven't even heard the two words "sonic" and "magic" in the same sentence until now.
and finally,here's a sonic commercial for a product called "dairy food." amazing name,i know.