

Yoshi Demo is a tech demo that appeared to be a Game Boy Advance port of Yoshi's Story. It is also commonly regarded as vaporware, though it is unknown Nintendo ever had any intentions of releasing it as a full game. The first version of the demo is completely mute, but the second version contains music and sound. The demo's ROM image can only be obtained within the Game Boy Advance SDK.

Platform / Adventure / Action / Fantasy
Super Mario World 2: Yoshi's Island is a platform video game acting as a prequel to 1990's Super Mario World. The game casts players as Yoshi as he escorts Baby Mario through 48 levels in order to reunite him with his brother Luigi, who had been kidnapped by Baby Bowser's minions. As a Super Mario series platformer, Yoshi runs and jumps to reach the end of the level while solving puzzles and collecting items. In a style new to the series, the game has a hand-drawn aesthetic and is the first to have Yoshi as its main character. The game introduces his signature abilities to flutter jump, produce eggs from swallowed enemies, and transform into vehicles.

Platform / Adventure / Action / Kids
This version of Super Mario 64, originally released only in Japan, is an enhancement over the International release of the game, as it retains all of the glitch fixes as well as graphical and sound changes. The main differences of this version are the Rumble Pak support, some small glitch fixes, the most notorious being the removal of the backwards long jump, a very important technique for the speedrunning scene, and a new title screen easter egg. This version would later be released on the iQue Player in China (without Rumble support), on the Japanese Wii and Wii U Virtual Console. It was finally localized and released internationally as part of Super Mario 3D All-Stars (under the name of "Super Mario 64"), with small visual enhancements.

Platform / Adventure / Action / Kids
Baby Bowser has taken the Super Happy Tree and cast a spell on Yoshi's world, turning it into the pages of a picture book. The only Yoshis not affected by the spell were six hatchlings that were still protected by their shells. It's up to them to reclaim the Super Happy Tree and restore happiness to the world. That is the only thing that can break Baby Bowser's Spell!

Point-and-click / Platform / Kids
Animaniacs: Hollywood Hypnotics is a cancelled 2D platformer based on the television series Animaniacs. The game was developed by Full Fat Games and was planned to be published by SWING Entertainment. A prototype has been found and released by Hidden Palace. In the game, Pinky and The Brain set up hidden speakers that induct mind control through eerie sounds to people and make them believe they are always shooting movies, so Brain can turn the Warner Bros. Water Tower into a rocket that would launch a satellite into space that plays loud barking noises to disrupt people of the planet. Yakko, Wakko and Dot, the only three immune to the eerie sounds set off to destroy the hidden speakers.

Yoshi's Island: Pacifier Edition is a simple ROM hack/mod that mutes Baby Mario's crying and the countdown sound when Yoshi is hit, a feature that could be considered as annoying in the game.

Twelve Tales: Conker 64 (known in the PAL regions as Twelve Tales Conker) is a cancelled video game that was going to be released for the Nintendo 64. First announced as Conker's Quest at E3 1997, the game would have followed the all ages environment of Conker's Pocket Tales, a handheld title released during its prolonged development cycle. Before the game could be finished, Rare had already made similar games that had already achieved general acclaim, most notably Banjo-Kazooie and Diddy Kong Racing. The developers began to receive criticism for creating another innocent platformer starring cute and friendly animals. In 1999, Rareware revealed that they were going to entirely redesign the game to appeal to an older audience. While it was first believed to be an April Fool's joke, the game went unreleased and replaced with Conker's Bad Fur Day in 2001.

Platform / Puzzle / Fantasy / Kids
Sutte Hakkun GB is an unreleased game for the Game Boy and Game Boy Color, compatible with the Super Game Boy. Both this game and Sutte Hakkun (an earlier cancelled Sutte Hakkun Game Boy port) were found in the Nintendo Gigaleak in 2020. The game has different levels when comparing to the previous versions.

Platform / Arcade / Action / Kids
Take to the skies with Balloon Kid. You'll have to think light as you float across the most unfriendly skies around. Nasty flying creatures will test your piloting skills, but don't go too low because even nastier enemies await you on the ground. Get extra bonuses by gathering all the balloons you can for a series of challenging tests of skill. Take a big gulp of courage and give Alice a hand as she searches for her missing brother. Play alone or use your Video Link cable to race against a friend. Either way, Balloon Kid will give you a lift.