Who could it be? Maybe Heinous and crew? But even after seeing regular ol' Marco, they seemed to think it was just Princess Marco in a disguise, and nobody in that episode corrected them.
The only other person I can think of willing to out Marco and cause him trouble like that is Jeremy. >Kelly breaks up with her boyfriend
Assuming they don't just get back together at the end, this will probably cause an uptick in people shipping her with Marco (if they don't spurg out about Kelly being impure or "used up" or whatever.)>Marco and Heckapoo episode
Oh shit, better get ready for another tsunami of Heckafaggotry. >Monster Bash
I'm kind of surprised Mewmen and monsters were starting to get along so quickly, I figured that wouldn't happen until season 4 (assuming it's the last season) and that some greater evil would cause them to unite forces.
I don't think Mewmen and monsters will bury the hatchet so quickly, I bet some 3rd party is kidnapping the quests with the intent to make the Mewmen and monsters blame one another, reopen old wounds, and set them against each other. But who would do this? Eclipsa? Some new bad guy?