Grimbleton is a vendor in Corepunk. It has 1 known spawn location on the Kwalat map. It sells 711 items.
He's been drafted into the alchemist's guild, but in reality he just wants to make hard drugs. He's never made a potion in his life -he's trying to refine blue crystal. He claims he has some sort of cancer or super space illness, but never keeps his story straight. He's supposed to be selling the drugs, but it's pretty clear from talking to him that he takes them himself. He's from a world where drugs are totally legal to make, and he knows how to make some pretty special ones. Unfortunately, due to all the drugs he's taken, he's forgotten.