Complete Monster: Redda is a Fallen Angel seeking the power of Oroboros to reform the world into a place of pain and terror. A master manipulator, Redda corrupts the suffering angel Gabriolis into becoming his commander and lead his armies to quash the defenders of the world. When Gabriolis learns of Redda's trickery, Redda declares his minion a fool and summons the Dread Dragon as a host for Oroboros, taking one heroine hostage within the beast to prevent her friends from attacking it and attempting to use the Dread Dragon to consume the world and create his desired eternal realm of suffering.
Nightmare Fuel: As if Reda's scary death mask that he wears over his hot Bishōnen face wasn't frightening enough, he loves subjecting things to disturbing splooshy transformations as well, such as having Oroboros give such a transformation to the Terror Dragon in order to give Oroboros a new body after the Terror Dragon itself is resurrected by him.
To Time Bokan (Yatterman, to be specific), according to a staff interview and how Once per Episode when the Count is defeated, his war machine turns into a rose-shaped cloud (like Time Bokan's skull-shaped cloud).note Mon Colle Knights was made by another company, however.
Woolseyism: Some think the added humor in the dub made the show even funnier, especially with the main antagonists Eccentro / Count Collection, Batch / Bacchi, and Gluko / Guuko.