Wet Craig was a character revealed during a Dorkly Q&A to be featured in season 4 of Pokemon Rusty.
Prior to the episode Jailbreak, Wet Craig was imprisoned in the Kanto County Correctional Facility where he participated in prisoner battles to earn cigarettes. As Shady Dan uses Rusty as a mock Pokemon (as "Knife boy") to fight against him, Wet Craig told him that he will get a cigarettes if he win, and he'll get two if Rusty dies.
As the Prisoners decided to escape after Perfect Bidoof (later named Peanut Butter) busted a hole on the wall, Wet Craig opted to stay in prison, as he was not ready to face the outside world.
In Bidocalypse, Wet Craig was most likely to stay in Prison even with Future Rusty's alterations.