Prof. Sludge is one of the main antagonists in Bunnykill. He has appeared in Bunnykill Vol 3. 1-2, Bunnykill 5.1, and was mentioned in Bunnykill 5.2. Prof. Sludge was the owner of The Moon Fortress base before it was destroyed by Snowball in Bunnykill 3 Vol. 2. He created the Mech Bunnies, Android Dust, the Giant Cyborg, and the serum that almost made Dust his loyal servant. He was first seen in a mini hovering pod in Bunnykill 3 Vol. 1, that had laser guns and a force field. Prof. Sludge is also a genius and possibly, a mad scientist. (This is only possibly though because he has not shown any insane acts of science in the series so far.)
Bunnykill 3 Vol. 2EditProf. Sludge was most likely stealing money for his experiments which is probably why Snowball was hired to take him out. (Not to mention the fact he aimed a doomsday laser at Earth.) He is first seen when Snowball finds him and Prof. Sludge reveals to Snowball his Mech Bunnies. Prof. Sludge leaves while Snowball is fighting the Mech Bunnies and is not seen until Smoke saves Snowball from the Giant Cyborg. Snowball and Smoke both confront him and Prof. Sludge trys to shoot them with his laser gun. Snowball easily deflects it back at his pod and cuts his laser gun in half with the light blade. The pod malfunictions and crashes into the ground. Prof. Sludge acts quick and activates Android Dust just before he is killed.
In Bunnykill 5.1, Prof. Sludge somehow managed to capture Dust, is is working on a formula to put into him so that he becomes his loyal servant. He also had Smoke hired to protect him from Snowball. Ironically, Smoke put an incomplete formula into Dust and left Prof. Sludge for dead. Dust then killed Prof. Sludge, then proceeded to kill anyone who got in his way of killing Snowball.
- Snowball - Prof. Sludge is the nemesis of Snowball. In every Bunnykill that Prof. Sludge has been in he has been the main antagonist of Snowball.
- Prof. Sludge is one of the most recurring villains in the Bunnykill series.