Starfish

The Starfish is an elusive enemy, appearing only in Super Princess Peach. It is a reference to the video game character Starfy, as the glossary describes it as "a star-shaped foe rumored to be the prince of a kingdom", which Starfy is, as well as it having his running, spinning, and swimming animations. It has pink cheeks and wears black sunglasses, referencing Starfy's hobby of wearing and collecting sunglasses.

Although the Starfish doesn't attempt to harm Princess Peach, though she still takes damage when coming into contact with it, the game describes it twice as an enemy. In the game's glossary, it is described as "a star-shaped foe[...]". Also, wherever it can be found, there is a message box stating it to be an "odd enemy".

The Starfish, out of all the enemies in the game, is the hardest enemy to find and defeat. It appears in a specific area within three levels each: 2-5 in Hoo's Wood, 5-5 in Wavy Beach, and 6-4 in Gleam Glacier. If the specific area that it can be found in is entered, there is a low chance that it will be there; leaving and returning via a pipe can lessen this issue. To defeat it, players must attack it in each of these three places. After defeating it in all three places, the Starfish will be added to the Glossary. Once it takes damage in an area, it will not appear in that area again.

In Hoo's Woods, it swims back and forth in a shallow area of water, and eventually will jump up into the sky and leave. Players must hit it or jump on it as it jumps up.

In Wavy Beach, it is asleep on the sand. The player must walk slowly up to it, then attack it, so it doesn't wake up and flee.

In Gleam Glacier, it stands on a ledge above the player. It will leave after a few seconds. To reach it, players must use their Gloom vibe.