Yeah, we should make a little peanut gallery of failure bosses.
Mocheeze - Removed for being impossible to balance and the model was hideous.
Skill4Life - Removed because the events decided to fall asleep on the job whenever the brick owner left.
PowerDag - Removed after one day because nobody authorized that ego-trip.
Space Guy - Wasn't ever really a boss.
SuperRiddler - Ignored as an idea, died in one round upon being implemented anyway,
NOW HE SEEKS HIS REVENGE.Edit: Oh yeah, I remember the Dragon Queen.
Dragon Queen - Evented. Same problem as Skill4Life, also I believe it had absurdly low health.