Kaizo Mario World

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Kaizo Mario World
Developer(s) T. Takemoto
Platform(s) Super Nintendo Entertainment System
Release 2007-2012
Genre(s) Platformer
Mode(s) Single-player

Kaizo Mario World (改造マリオワールド, Kaizō Mario Wārudo), also known as Asshole Mario, is a series of three ROM hacks of the 1990 Super Nintendo Entertainment System video game Super Mario World, created by T. Takemoto. The term "Kaizo Mario World" is a shortened form of Jisaku no Kaizō Mario (Super Mario World) o Yūjin ni Play Saseru (自作の改造マリオ(スーパーマリオワールド)を友人にプレイさせる, "Making my friend play through my Mario hack (Super Mario World)"). The series was created by Takemoto for his friend R. Kiba.[1]

Kaizo Mario World features extremely difficult level designs on the Super Mario World engine.[2] The series is notable for deliberately breaking all normal 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. This cruelty and the resulting frustration, as well as the skill level required, is both the purpose of the hacks and the appeal of any Let's Play videos made of them.[3]


Gameplay from Kaizo Mario World

Kaizo Mario World first gained popularity after being uploaded on YouTube under the title Asshole Mario.[4] Let's Play videos of Kaizo Mario World have received millions of views online.[5] The unique difficulty has also attracted speedrunners. On January 1, 2015 dram55 became the first person to complete a deathless run of the original game, a feat which has since also be accomplished by Calco2.[6][7] The original game was featured at Awesome Game Done Quick in 2015 with dram55 speedrunning it.[8]

The later games in the series did not have the same popularity as the original, but are still very popular games to speedrun or do Let's Plays of. Kaizo Mario World 3, the final game in the series, is widely considered to be the hardest Super Mario World Kaizo hack in existence, being very notable for its final boss fight which features heavy RNG. There are only 8 known people in the world to have beaten the game without the use of savestates, while DoDeChehedron is the only person to have done so in a single sitting.[9]

List of ROM Hacks[edit]

Timeline of release years
2007 Kaizo Mario World
Kaizo Mario World 2
2012 Kaizo Mario World 3
Game Year System Notes
Kaizo Mario World 2007 Super Nintendo
Kaizo Mario World 2 2007
Kaizo Mario World 3 2012


The Japanese word "kaizō" (改造) simply refers to ROM hacking in the gaming industry, since its literal meaning is "reorganize," "restructure," or "reconstruct," but Kaizo Mario World's prominence means that this term has been used by other hacks to indicate an extreme level of difficulty, such as Kaizo Mario Bros. 3, Kaizo Mario 64, and the Kaizo Caverns Minecraft map in Vechs's Super Hostile map series.[10] This has also lead to the term "Kaizo Hack", meaning a ROM hack of a game intended to be extremely difficult or unfair, that is intended to push the difficulty to the limits of human capabilities. Excessively hard hacks, such as the Item Abuse series, that go very far beyond human skills, are called pit hacks.[11]

SMW Central, which has a depository of Super Mario World ROM hacks, has the difficulty categories "Kaizo: Light" and "Kaizo: Hard" for ROM hacks in the Kaizo Mario World style.[12] Of these, Super Dram World, Super Dram World 2, and Super Panga World have been speedrun live at a Games Done Quick event.

Kaizo Mario World has also been the inspiration for many levels created within Super Mario Maker. One of the most notable is a level created by PangaeaPanga titled Pit of Panga: P-Break, which was for a long time considered to be the hardest level in Super Mario Maker.[13]


External links[edit]