Kirby Super Star Ultra is a remake of Kirby Super Star, with improved graphics and new Sub-Games.

To do: Find a cheat code to get into the debug room. There's also some unused sounds and music tracks accessible through the game's sound test.

Unused Rooms

There are at least four unused rooms in this game.

Room 70

This "room" consists of nothing but some garbage data... and water. It has no background, and the music that plays there is a track used in "Gourmet Race" Stage 1. Judging by the room's ID, it belongs to "Gourmet Race" sub-game - it's placed right after Trial Room #2 of "Dyna Blade" and before the first level of "Gourmet Race".

Room 74

This room is a leftover from Kirby Super Star. Decorations got changed, but the general layout is mostly same as before. It was supposed to act as an ending sequence to The Great Cave Offensive sub-game, just like it does in the original game, but this game uses a cutscene to accomplish this. This room has no background, unlike the original game, but the music that plays there didn't get changed. Judging by the room's ID, it's placed right before the intro room in The Great Cave Offensive.

Room 197

This room, just like the previous one, is a leftover from the original game. It actually has a background this time!.. but not music. In the original game, this room acts as a cutscene in Revenge of Meta Knight sub-game when Kirby becomes a Wheelie Rider, but this game uses a cutscene to accomplish this. Judging by the room's ID, it's placed right after the Meta Knight battle and before the Halberd escape sequence.

These two rooms might have been actually used before the cutscenes were made.

Debug Room (Room 547)

This room was created most likely to test various terrains Kirby can encounter within the game, including sloped tiles, switch platforms, a cannon, bomb blocks, and water currents. And, you probably guessed it, this room has no background, and the music that plays here is a track used in "Spring Breeze" Stage 1! It's also worth noting that this room is the last room in the game, judging by its ID, and for some reason all 3 tutorial rooms are placed right before it, with the IDs of 544, 545, and 546.

The doors are fully functional - if Kirby enters the first door near the starting point, he exits from another one in a slope area; if Kirby enters the second door, he exits from nothing in an area with transparent star blocks; if Kirby enters third door, he exits from another one near a water current room. All doors near these areas, including the one on the top-right, will lead Kirby back to the starting point if entered.

The cannon is actually fake - it doesn't take you anywhere! Instead it just self-destructs. These types of cannons are seen in some areas in the retail game.

Unused Level Features

Green Greens Room 1

In the first stage of Spring Breeze, Green Greens, there's an entrance coded (marked pink in the screenshot), nearby a Warp Star, that can't be entered in normal play. Through hacking you can enter it...

The entrance leads to the room that you'd normally get to by riding on said Warp Star. Developers most likely put it there for testing purposes before the Warp Star sprite was finished - even judging by the room's ID (1), it's safe to say this is the first level made for the game!

This entrance is also present in Metaknightmare Ultra version, which serves the exact same purpose.

Halberd Stage 6

After Kirby destroys Halberd's left wing and flies back to the ship, he lands in a room where he has to enter a giant hole in the wall behind to progress.

There are 9 entrances, but only first two rows from below can be entered (marked green). The highest row is intentionally set to not be enterable (marked pink), as it probably would be weird seeing Kirby enter a wall. Entrances marked pink warp Kirby to the exact same location as the enterable ones, if entered.

Said entrances are also present in Metaknightmare Ultra version, which serve the exact same purpose.

Tutorial Rooms

Each tutorial room (except for one in The Great Cave Offensive, the tutorial there takes place in a cave) have a trigger (marked pink in the screenshot) that change the tile it's on to one of the unseen ceiling tiles mentioned in section below... for some odd reason.

Because the trigger never actually triggers, you can't see both the trigger and an unseen tile in action.

Unused Level Tiles

All Tilesets

Every single tileset in the game has at least one dummy tile, that almost always acts randomly. One time it can spawn wind effect, other times it can act as another tile, or just be a decoration. It doesn't have a specific graphic either - it grabs random pieces from the tileset's tiles and puts them together.

Tutorial Rooms

All tutorial rooms (except for one in The Great Cave Offensive, again) have unseen ceiling tiles at the top. Because the camera is locked in place, it's impossible to see them normally. There are a whole 12 tiles that go unseen because of this.

Halberd

For some reason, most if not all tilesets used for Halberd, including version in Milky Way Wishes sub-game, have weird unused tiles. Not only do they look weird, they have many, many duplicates of each other spread all over the tilesets!

Twin Woods Arenas

Same thing here, almost every battle against Twin Woods use tilesets, that have many duplicates of one and only tile. The tile consists of just 9 small white crosses.

Grape Garden's Cave

Fatty Whale Arena

Marx Soul's Arena

Tileset used in the secret final boss arena has some unfitting tiles, including wind tiles and a water tile. This time developers didn't make graphics for them.

There are many tiles like this in other tilesets.

Debug Room

Full Debug Room map.

Even though the tileset for the debug room is unique, it actually has a lot of unused tiles too, unsurprisingly. Picture on the left shows what the unused tiles are, and picture on the right shows what tiles are actually used in the debug room.

Regional Differences

Like Kirby Super Star, the differences in the food items between the Japanese and international versions are retained in this game.