Ruin Maniac (Trainer class)/Manga

Pokémon Adventures manga
A Ruin Maniac named / is seen battling Valerie in the Battle Dome. While it is unknown who won, what is known is Dusty at some point lost a match, eliminating him from the tournament.

Pokémon Diamond and Pearl Adventure!
In Find Munchlax!!, a Ruin Maniac is one of the three Trainers searching for. He uses his "ruin excavation skills" to scatter bait and dig a trap.