The Demolitionist is a character who first appeared in comic #284.
He is a dwarf who was the cause of Tyrone's fourth death (if counting the April's Fools special). He atomized him with a stick of Dynamite.
After Maxx got back, he said that the crater the Demolitionist made would become his new house, as there isn't enough space.
His possible name could be Gimli.
Ask Gimli son of Bomberman here. -June (#294)
- His possible name, Gimli, is a reference to the Lord Of The Rings. Also, Gimli is one of the possible names of Demolitionist NPC in Terraria, the game which has largely insoired the comic.