Kaizo Mario World

also known as ''Asshole Mario'', is a series of three ROM hacks of the Super Nintendo Entertainment System video game ''Super Mario World'', created by T. Takemoto. The term "Kaizo Mario World" is a shortened form of the title The series was created by Takemoto for his friend R. Kiba.

''Kaizo Mario World'' features extremely difficult level designs on the ''Super Mario World'' engine. The series is notable for deliberately breaking all standard rules of "accepted" level design and introduced many staples of later Kaizo hacks, such as placing hidden blocks where the player is likely to jump, extremely fast autoscrollers, dying after the goal post, and various other traps. These cruelties and the resulting frustration, as well as the skill level required, are both the purpose of the hacks and the appeal of any Let's Play videos made of them. Provided by Wikipedia