In order to produce a Mewtwo, a Mew must first be placed in the machine by right-clicking the machine with a Mew in the player's party. Afterwards, any combination of three blocks of diamond, gold, or iron must be inserted into the machine. Higher quality blocks will increase the chance of producing a Mewtwo instead of a Ditto, up to a maximum success rate of 75% with three diamond blocks. On the flip side, if three iron blocks are put into the machine, the success rate will only be 15%.