>>25205015Some combination of 5 of the pokemon he's released over the years (Butterfree, Primeape, Pidgeot, Lapras, Goodra, etc.), and make the 6th a Pikachu.
Tell your pokemon ahead of time to make eye contact with Ash the whole time, and to throw the match after using their 4th move, and to ham it up by screaming in pain when their opponents' attacks hit. Tell Pikachu not to fight at all, just stand there and take hits while pretending to look disappointed in him.
Beat him psychologically.
Then reveal yourself to have been Gary Motherfucking Oak all along. 
