Professor Oak

A character from Pokemon Red, Green, Blue.

BOY or GIRL
A Pokemon professor from KANTOOOOO who gives kids a CHARIZAAAARD and two other irrelevant lizards. Stopped holding back and evolved from his calm persona into PSYCHO OAK.

Off-Season 8
When Oak's madness can no longer be contained and he runs out of poor unsuspecting trainers to vanquish, he turns to the ring, showing his full power unlike when he held back for some edgelord ages ago.

On his way he captures a trainer-less Regigigas that was around.

Episode 55
With the sheer madness contained within Oak, he was able to see right through Jacket and Cow, and ordered Regigigas the correct move to snatch their newly won titles.