Did you ever wonder how Scooby learned to talk?
It’s not difficult if you consider Scooby and Shaggy were practically inseparable.
My guess is, they probably found a way to separate them, so Scooby retained his ability to talk, while Shaggy kept his to eat like a damn animal.
Strangely enough, this one’s not even the worst Fullmetal Alchemist parody I’ve seen. Either that or I’m completely immune to the chimera part.
I’m not sure what the source is, but this appears to be it.