YMMV: Kaizo Mario World
- Breather Level: The underwater level in the first game. Still difficult, though.
- Internet Backdraft: Go a head. Bring up Kaizo world in a ROM Hacking community, even ones that aren't for Super Mario World. As the Seinfeld Is Unfunny trope below says, most ROM Hacking communities aren't big on Kaizo world for a variety of different reasons, with the main one being because it made everyone believe ROM Hacks, Super Mario World or otherwise, are nothing but poorly made Fake Difficulty ridden trollfests, thanks to the multitude of poorly made "Kaizo clones" often made to specifically piss ROM Hack LPers off on camera for the lulz. In fact, this is also the reason why many previous ROM Hack LPers have stop doing ROM Hack LPs, and bringing this up with them is not a particularly wise thing to do.
- Memetic Mutation: Slowbeef: SNES9X
- Seinfeld Is Unfunny: After years of other bullshit ROM Hacks being made specifically to piss off the player, and quite the big backlash against these kinds of hacks in general by ROM Hacking communities, even outside of Super Mario World, and LPers alike (quite a few big ROM Hack LPers have flat out quit playing ROM Hacks because they were tired of getting nothing but "Kaizo Clones"), the original Kaizo is, at best, seen as a relic of a bygone era, and at worst treated with nothing but bile for creating the mindset that "ROM Hacks need to be bullshit hard for the sake of being bullshit hard" in the first place.
- Surprisingly Improved Sequel/Even Better Sequel: Depending on one's perspective, the third game is generally considered one or the other; the level design is considered less gimmicky than that in the first two, and some traits that are regarded as eyesores (stacked munchers, for example) are toned down or eliminated completely. Notably, for this reason the third game was the only Kaizo hack accepted as a submission on popular tool-assisted speedrunning site TASVideos.org.
- That One Level: The original's second Special Stage. Yes, the one with the video linked above.
- The third level in the sequel, with constant munchers and mobile ropes. It's hard to the point that after the goal post is crossed, Chargin' Chucks applaud you for clearing it.
- The second-to-last stage in Kaizo 3. The second half is one giant Rube Goldberg machine of death, and if you screw up once, you will be unable to access the exit pipe.