Poison/Dark/Steel/Flying
Rover: Rover isn’t actually made of steel, he’s made of extremely toxic metals and minerals. Combined with the fact he can spit acid, he makes for a dangerous enemy. Touching him could cause poisoning, some cases of which have proved fatal.
Abilities: spitting acid, poisoning people by touching them (has control over its effects some of the time), he does possess the ability to remove toxins from most substances. He can actually cut through 4 inches of concrete with just his claws without difficulty.
Backstory: [redacted]