Dross: defective monster. Writhes along the ground like a huge maggot and groans loudly. Fatally attracted to fire.
Snargle: defective monster. Incapable of locomotion. It is constantly gurgling and coughing.
Feculus: defective monster. Constantly oozing fecal matter from its "nozzles". Known by several other names, all of them crass.
Chainsaw kid: with a motorized saw for a face, incredibly high endurance and an insatiable lust for violence, Chainsaw kids are highly prized battle-monsters whether in the arena or the warzone. They are of human intelligence, but their vocabulary is usually limited to the word "Chainsaw" for reasons they alone comprehend. Most inexplicable however is their intense fear of cats.
Xenogog: the origin and purpose of these beings is shrouded in mystery. The first were discovered patrolling an equally mysterious subterranean labyrinth of spherical metal chambers, and the means of creating these monsters took generations to unravel. Small in size, Xenogog move as though under extremely low gravity, bouncing in slow-motion and wafting through the air. Their needle-like arms can pass through matter as though incorporeal, but cause internal bleeding in living things. Electronics go haywire when a Xenogog is near.
Belladonna: once used as an execution device, this hollow metal monster splits apart to impale victims on all sides with its inner spikes and long, iron nails. It continues to carry the remains of its most recent prey inside its body to sustain itself, and is said to absorb the memories of all it consumes. It has a telekinetic control over the blood of these meals (or, more accurately, "batteries") and exudes gory pseudopods from its many openings. Regardless of its assimilated thoughts, it is always very childlike and mentally female. It loves flowers, not caring (or perhaps not noticing) that they wither and die in its presence.
Creative, to say the least