It is unlocked by training Invention via disassembly, siphoning (including mechanised siphons), or making gizmos. Gaining this pet is based on the amount of experience awarded at once; the more experience granted, the greater the chance of gaining this pet. The chance is not affected by experience boosters. When a player obtains the pet, they receive one of the following messages: In a purely mathematical format your chance of receiving the pet on any particular action is Where: