The code is in the art book that you order at the MechQuest homepage.
eu quero com pra um pet no aqw
you must type skull-??????-crusher
There is no skull crusher class in AQW but perhaps you mean the skull crusher armour. This is only available if you bought MechQuest Art Book from HeroMart. It is now rare though.
mundu
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OICU812
you simply go on a server and say /enter skull code
you just type in a random code
art5-6274-6030-1524
o81
idue-dkch-94n0-328d
You get the skull crusher hammer when you beat phantom ganon at the forsaken fortress