|This feature is part of the Extreme Edition fan-made expansion.|
The Boss Parade is a special preparation meant for the purposes of getting the Scrooge badge, very similar to the Vicious Token. Unlike that, it doesn't actually make the dungeon harder to win, but rather it extends it with a special subdungeon you can only enter after beating the main boss. The subdungeon features all 12 random bosses (with stats affected by the dungeon difficulty multiplier) in a fairly large open room, and to earn the badge you must take all 12 down. Each boss drops 25 gold and is EXP valuable.