Were you looking for Tom the Toxic Pea, the good, normal form of ACID?
ACID is the killer robot version of Tom the Toxic Pea.
In the locked rooms
He was Tom the Toxic Pea. He only had a short appearance until he got transformed into a killer robot by HAWKINS'S killer robot transformation bullet machine gun. ACID has died before. Tom the Toxic Pea is now trying to get through The Challenge of The GoBots Locked Rooms as his normal self.
Other Killer Robots that obey HAWKINS: Friends.
HAWKINS: His master. Will do anything to make sure HAWKINS doesn't get hurt.