Tomato Adventure is a role-playing game developed by AlphaDream and co-developed by Graphic Research. The game can be considered the spiritual predecessor to Mario & Luigi: Superstar Saga because it is heavily modeled on this game and two unused tunes based on the Tomato Adventure title theme are present in Mario & Luigi: Superstar Saga.  The game used to be in development for the Game Boy Color (like Densetsu no Starfy was) as "Gimmick Land" but transitioned to the Game Boy Advance and had its name changed to "Tomato Adventure".
On their quest to defeat the six Super Kids and gather the six toy parts to enter Gimmick Palace, confront King Abīra and rescue Pasaran, Demiru and three other characters Aresa, Sofubī and Rereku who join him later in his quest, battle enemies with toy-like weapons known as Gimmicks. When using a Gimmick, the player has to complete a small mini-game, such as one that requires timing.
This was done to encourage the active participation of players unlike traditional attack input from role-playing games that may require the player to simply select an attack.
The player character can select a total of 4 Gimmicks to use in battle (more can be hold to choose from on the Gimmick screen outside of battle). Gimmicks have a limited number of uses, but this can be increased through the use of items and running out of uses for all Gimmicks (after which the number of uses for all Gimmicks replenish automatically).
Like traditional RPGs, the player will obtain items that can help them in battle. Items such as gear and healing items can be purchased from shops with the game's in-game currency, Topar, that becomes available from beating monsters.
When the player makes it to Oisu Town, after beating the third Super Kid, the player can decide to play a card game called Gimika that can either be played with characters in the game or other Game Boy Advance systems.
Tomato Adventure takes place in the Ketchup Kingdom; a kingdom inhabited by children lead by the tomato loving King Abīra. The adventure stars Demiru, a hare-like character wearing blue and white clothes. Demiru was banished to a village by a cliff named Koborē Village (Japanese: コボレーむら) because he is an outcast who dislikes tomatoes.
One day, on Tomato Day (Japanese: トマトきねん日), a national holiday, Demiru was watching television and an important announcement was made. It was revealed that a machine was finished called the 'Super-Cara Cooker' and according to Abīra, the 'Super-Cara Cooker' would allegedly would let the children of the Ketchup Kingdom stay kids forever.
Later in his adventure, Demiru was let off from Koborē Village because it is Tomato Day, though not without a battle with the Surveillance Kid. While exploring the Toy Ruins (Japanese: オモチャのいせき) with his girlfriend Pasaran, Pasaran is kidnapped by two purple creatures with zippers on them called Borikki and Gorikki and taken into an airship, so Demiru sets off to rescue her.
Pasaran is taken to the Gimmick Palace and King Abīra plans to charge the Super-Cara Cooker with her energy. It is soon revealed that in actuality, the Super-Cara Cooker is a machine that will turn everyone into toys.
In his quest, Demiru must battle bosses called the six Super Kids to prevent the Super-Cara Cooker being activated and collect six different toy-parts that will let him enter the Gimmick Palace (Japanese: ギミックパレス) and battle King Abīra.
References from other games
- DeMille and the Tomatrio appear as available spirits for the player to acquire in Super Smash Bros. Ultimate.
- Tomato Adventure on Wikipedia.
- Official Nintendo mini-site.
- Section on the official AlphaDream website.
- Nintendo Space World 2001 mini-site section.