Glitches in Kirby Super Star
Marx Battle Teleportation
If Kirby and the Helper are using the Hammer or Parasol abilities (can have one player be hammer and the other be parasol or both players can have the same ability) (also can be done with a CPU controlling the helper), there is a very slim chance of randomly teleporting to a glitched Marx battle. Winning this battle will still count as beating Milky Way Wishes, even if it has not yet been unlocked.
This glitch can still be performed if the helper does not have the Parasol/Hammer ability, but it is much less likely.
It has been said by people who performed the glitch that it may fry the SNES the glitch was performed on and/or freeze the game when preformed.
Pressing Up & Down Simultaneously
These glitches are almost impossible to perform on real consoles due to the requirement of pressing ↑ and ↓ simultaneously, but is commonly abused in TAS speedruns. In addition, these glitches are only executable in the Japanese version.
For the Fire ability, when using the Burning Attack, the player can press ↑ and ↓ simultaneously to make Fire Kirby move down at a very fast speed, capable of warping through walls and platforms (or even commit suicide if the player wishes to save time in certain scenarios).
For the Jet ability, when using Jet Headbutt or Jet Cracker, the player can press ↑ and ↓ simultaneously to make Jet Kirby move up at a very fast speed, capable of warping through walls, platforms and ceilings.
Plasma Instant Charge
For the Plasma ability, pressing ↑ and ↓ simultaneously will result in a max charge instantly.
Ultra Jet Jump/Super Jump to OHKO Mid-Bosses
The Jet ability's Ultra Jet Jump attack as well as the "super jump" (any player jumps by stepping on the other ally) can defeat any Mid-Boss in one hit. Since Mid-Bosses spawn from the air in this game, they can be OHKO'd by this glitch before even landing.
Wheel Roll on Wall
To perform this glitch, Kirby must acquire the Wheel ability. As Kirby, dash slowly by holding the Y then A button at the same time, then roll into a wall. If done correctly, Kirby should not crash into the wall, becoming invincible and dealing continuous chip damage to any enemy on contact.
0% 0% 0% (Save Corruption Glitch in the Japanese Version)
In the Japanese cartridge version only, all three save files have uncommon chances to get corrupted and become the starting 0% state, possibly due to the fragility of the graphics chips. This makes it the most infamous glitch of this game in Japan, commonly written as 0% 0% 0% in the Japanese community. The 0% 0% 0% glitch was mentioned during a live-streamed interview with the HAL Laboratory developers in the Kirby 25th Anniversary Orchestra Concert.
- Obtain the Sleep ability in Milky Way Wishes.
- When Kirby is sleeping, press and hold L and R, then leave the stage.
- Enter the Galactic Nova. After the Marx cutscene, enter the Heart of Nova stage.
- The game shall freeze right after entering the Heart of Nova stage. Then reset the game.
- After resetting the game, all three save files shall be corrupted and become 0% 0% 0%.
The 0% 0% 0% glitch is parodied in Episode 2 of the anime Pop Team Epic, with a parodied Kirby Super Star file select screen in 0% 0% 0%, and the narrator (presumably Pipimi) shouting "Zero percent!" three times in a row (in Part B, Pipimi is voiced by Shigeru Chiba, who interestingly also voiced Hyness in Kirby Star Allies).