Mokey Mokey (series)
At least 22 "Mokey Mokey".
If "Junk Warrior" is Synchro Summoned after "Mokey Mokey Smackdown" goes off, "Junk Warrior" will have at least 5300 ATK.
"Mokey Mokey" monsters are very weak, so you will not be able to destroy opponent's monsters except with effects (or monsters that have enough ATK to destroy at least some monsters). Also, there is a little chance that you get "Mokey Mokey Smackdown" and at least 1 "Mokey Mokey" in your first turn of every Duel. And all that is needed to make this Deck weak is to destroy "Mokey Mokey Smackdown", because your "Mokey Mokeys" will not gain ATK bonus.