Wedding Party Rockers is an expansion of Ultimate Chibi Defenders: Wedding Edition. It includes 6 new Heroes, a game board extension so that Wedding Crashers may now approach the cake from 4 directions, 1 new class of Wedding Crasher - the Dog Party - that cannot be blocked, new rules for adding abilities to the Dragon and Wedding Crashers to increase difficulty (and reference cards to compliment) and a new, alternate boss - the Master of Ceremonies.