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• Starfy is neither a Starfish nor a Star.

• Starfy made a cameo as an elusive enemy named "Starfish" in the Nintendo DS Mario game Super Princess Peach.

• In Densetsu no Starfy 3, Wario from the Mario series makes an appearance as an ally of Starfy.

• Konk, the first secret boss of the The Legendary Starfy is actually a recurring character and enemy/rival of Starfy in the Starfy series who has acted as the first boss in every Japanese game except The Legendary Starfy.

• In Mario & Luigi: Superstar Saga, Starfy makes a cameo appearance on a movie poster titled Legend of Stafy.

• Densetsu no Starfy, the first game in the series was originally made for the Game Boy Color rather than the Game Boy Advance.

• It was shown at Nintendo Space World 2000, with various differences from the final game and a working debug menu.

• In the Japanese version of Donkey Konga, one of the available songs is "Densetsu no Starfy". It is actually Tone of Ocean as sung by Becky. Tone of Ocean is the main theme of the The Legendary Starfy series.

• In Densetsu no Starfy 4, there is a costume for Starfy and Starly that is based on Princess Peach. Starly also holds a perry, the parasol from Super Princess Peach.

• Starfy, Starly and Moe own a Nintendo Wii with Wii Sports in the Densetsu no Starfy R manga.

• Satomi Kōrogi, the voice actress of Starfy and the Mermaid is also the voice actress of Pokémon such as Pichu and Togepi.

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