Spring Breeze was originally not going to have the copy ability system at all, presumably to emulate the difficulty of the original Kirby's Dream Land that it was based on, but this idea was abandoned. Masahiro Sakurai, though, wished that every player would at least try the game once without copy abilities just for a unique challenge.

The "5 Games in one!" feature of the game came from Masahiro Sakurai's need to keep the player's attention and interest in this SNES game, as he believed that massive games that were on the market at the time might overwhelm players or bore them with their consistent and continuous gameplay.

Sakurai also revealed a scrapped 6th game that was going to be available in the pack: "Kagero Mansion". This game would have featured Kirby's mouth "sealed shut". The pink hero would then have to utilize different items that represented copy abilities to get by.

The two-player aspect of the game came as a request from Shigeru Miyamoto, who thought multiplayer would fit Kirby even better than Mario due to the Kirby games' slower pace. Masahiro Sakurai, however, struggled a bit with implementing it due to multiplayer in other games awkwardly affecting things like the camera. Sakurai and his team eventually found workarounds to this dilemma in the form of the Space Jump mechanic, and what he described as a "Lead Player and Supporting Player" system.

Kirby Super Star, despite being intended for a SNES release from the get-go, actually began development on the original NES. This unreleased prototype was used for internal purposes only, as a way of finalizing all the ideas that would go into the final product. This can be seen with the NES sprites for the Yo-Yo and Cutter abilities, which were released to the public over 20 years later in an issue of Famitsu: the sprites shown look nearly identical to their counterparts in the finished product, with the main exception being the lack of Super Star's signature ability hats. Director Masahiro Sakurai stated that this type of development style is beneficial to him, as the starting step of finalizing all of a game's ideas via an internal prototype makes the rest of development significantly easier.

Along with many other small unused text and graphics, one of the main ones that didn't make it in the final game were Meta Knight's bats, which were originally going to be used as projectiles by Meta Knight, either when you battle him face to face or when you're escaping the Halberd.

A locked icon of the Great Cave Offensive can be found in the game's data, suggesting that the player would originally have to unlock the Great Cave Offensive. However, it is already unlocked when the game starts in the final release.

If the player uses the copy ability on Scarfy, Kirby can obtain the Crash ability. It's only possible to get Crash from Scarfy with this method.

There are a few glitches that were fixed when the game was localized overseas, mostly involving pressing opposite directions simultaneously.
•When using Jet Kirby and doing a semi-charged or fully-charged boost in midair, pressing up and down while flying sends Kirby flying diagonally. If Kirby bumps into a wall after a semi-charged boost while holding up and down, Kirby will bounce upwards very fast.
•When using Fire Kirby while doing a running boost in midair, pressing up and down will cause Kirby to shoot down very fast, passing through floors.
•When using Plasma Kirby while holding left and right and pressing up will charge Kirby's plasma beam to the maximum immediately, allowing you to fire fully-charged shots right away.
•When using Yo-Yo Kirby, pressing up, down and Y in midair will cause Kirby to disappear from the screen. If this is done with a helper, the game will act as if the helper doesn't exist.
•Pressing up and down on a ladder causes the game to crash, or could possibly send you to the credits of Milky Way Wishes.

When Kirby Super Star was presented at E3 1996, a few things were seen that were changed when the game was released.

When choosing one of the eight games in the menu, a cartoony bounce sound effect can be heard when changing the selection, and while playing in any of the games the top-right corner of the screen shows stars, but it's unknown what they were going to be used for.

In the Japanese release there are weeds in the foreground of the "Samurai Kirby" mini game. They were removed in the international versions, possibly to make room for the translation text. The weeds were later revised in Kirby Super Star Ultra.

After completing a round of Gourmet Race, the time on the very bottom of the screen will say "clear time" in the Japanese version. This was changed to just "time" in the International versions.

At the very end of the credits in the Japanese version, two words will pop up that says "and more". In the International versions, it says "There's more".

The credits for Milky Way Wishes has a maido sign on one of the Kirby graphics in the Japanese version. The maido sign was removed in the international versions due to Nintendo of America's regulations on Japanese culture.

Meta Knight's ship is named the Halberd. The "Hal" in Halberd could possibly be a reference to the developers of the game, HAL Labratories, as well as the real-life weapon.

The game was released in Europe under the name "Kirby's Fun Pak". However, when the game was released on the Wii U Virtual Console in Europe, the game kept the name Kirby Super Star.

Although the colors of the buttons on the SNES controller were changed from purple to red, yellow, green, and blue in the pal release, the text was never altered in the game's tutorial, and so it still refers to the controller having purple buttons.

In the Japanese version, a Shoshinsha mark (a Japanese symbol that new drivers must display on their car for a year after obtaining their driving licence) appears in the background of menu asking whether the player wants to view the game's tutorial. When the game was localized to the West, the Shoshinsha mark was replaced by a picture of Kirby.

It is actually possible to defeat the Heavy Lobster during its first encounter in the Revenge of Meta Knight sub-game before the main engine blows Kirby off the ship. However, despite disappearing after being defeated, parts of the Heavy Lobster still appear in the engine blast alongside with Kirby.

The enemy and helper Capsule J from the original game was removed from the remake due to an uncanny similarity to Konami's Twinbee.

The Kanji on Chef Kawasaki's apron means "To Eat".