After burner is the Charizard of Todd [link]
who went fighting team rocket. The base that they went to was working on experiments to boost Pokemon abilities. One of the particular experiments was a serum that was meant to cause a 3rd like evolution to already fully evolved Pokemon. The only problem with the serum was that is overwhelmed all the Pokemon exposed, killing them. Because of this, the leader of the base used it like a weapon. He injected Todds Charizard with it but after hours of excruciating pain After Burner pulled through. He was already many time bigger and was a lot more dragon like. He then saved Todd from the rocket boss by eating the boss and continued to burn down the base after everybody fled from it. He later excreted the slightly bleached and smelly Rocket boss.
I have drawn a whole heap of Todds other Pokemon and still have some to go. I won't be doing them for about another week though as I am going on my school trip to Kyoto, Nara and Osaka. I'm not exactly happy with Charizard mostly because I rushed him so I could finish packing for my trip :\