One night in an unknown basement somewhere, there was a Sonic-esque monkey in a cage. Of course, it had spikes on it because it's a Sonic character. The monkey was mentally ill, to put it nicely. He babbled like a moron and banged the bars of his cage with his fingers. After all, he had been used in drug testing, and had been injected with heavy levels of chronic, which made him extremely irritable and impulsive.
A scientist was experimenting with chemicals, and, as usual in these kinds of stories, something went wrong. A violent reaction ensued. The vat levels overheated and everything went crazy.
"OH NO!" the scientist cried out "A chemical reaction that will destroy me and possibly the monkey in this laboratory! How clicheeeeeeeeee!!!!"
An explosion occurred. The scientist was dead. The monkey got up from the wreck. The explosion did something to him.
Perhaps his DNA was altered?
Was he faster? Was he stronger? Was he smarter?
The monkey ran at breakneck speed in circles; too fast for a regular monkey.
"Wow! I'm faster!" he cried "FASTER I AM! FASTER I AM! WHEEE!!!"
He was definetely enjoying himself. He had never had this much fun. So he stopped to throw a piece of the laboratory rubble. He picked up a massive chunk at will.
"Wow, I'm stronger, too!"
He chucked the chunk about 500 miles away. He couldn't see it anymore.
"Wow, I'm smarter too! The square root of a pie plus 17 is equivelant to the sum of the subtraction of... well, I'm faster and stronger!"
Now he set off to find some adventure or something. After all, what would he do just sitting around?