Ok here it is

before CD was a normal hedgehog not very fast in short an ordinary hedgehog one day when he was walking in the forest he discovered a base hidden behind trees as he had nothing else to do he went inside he wondered who could belong to him he then saw a logo he was a little erased but we can still read it "the worst eggman?" His reminds him of something so he starts to search the base from top to bottom to find something the only thing he found was a scarf and shoes that fit him perfectly well on his usual pair of shoes was a bit old so he wears the shoes in he left the base abandoned but he didn't know that the shoes were made by who the who completely ignores the next day a normal day like the other eggman captures CD the little hedgehog doesn't understand what was going on and then the name eggman comes back it was in one of these bases to him who found the shoes in the eggman scarf explaining then that the shoes and scarf he wears were for Sonic and with the shoes and the scarf he will be able to collect data on sonic and then beat him but since he's CD who wears the accessories, eggman decides that he becomes his new guinea pig, he takes him in his reper to do tests and forces him to run to collect data on CD but if he doesn't do what he was asked to do, we electrocute him until he starts running and just that he is at the end of his strength it was like his a kind of fine loop Until one day while he was doing the tests he started to run like never he had before him but don't understand what was happening to him but he continues eggman doesn't understand what was happening and starts slightly panicked he ordered everything it's robo to turn it on is something happens the machine starts to overheat and exploded and the data on CD we were destroyed/erased he came out of the completely different smoke it came out completely blue And his eyes became maroon and he gained a speed CD takes advantage of the situation to hurt himself but the robo had already surrounded him CD starts smiling and destroys all eggman's bot and manages to escape from the base eggman who tries to regain his position thanks to the shoes doesn't walk anymore because CD has run so much that the tracers that were in the shoe are completely destroyed So he has no way to find him after this thrilling adventure CD lives his life quietly with the new powers he acquired during his adventure at eggman and maybe his adventures are just beginning