|Starlow did not originate from fanon, and more information can be found on their respective wiki(s). You may read more about it on the following wiki(s):|
Starlow looks like a yellow ball with a face and feet with a star floating above her. Her appearance is presumably the same as a normal Star Sprite, albeit that she's female, thus having no mustache.
Mario & Luigi: Sibling Warfare
Starlow appears as Mario and Luigi's helper in Mario & Luigi: Sibling Warfare. She has a similar role yet bigger then Mario & Luigi: Bowser's Inside Story. The other Star Sprites also appear in the game alongside her.
Starlow makes an appearance in this game. Her purpose is similar to the one of the Cosmic Spirit from Super Mario Galaxy 2 (who got a similar purpose to the Super Guide Block), and partly the one of Robud of Super Mario Nation. Starlow can help the player by guiding him/her to the Power Star whenever someone lost eight lives in the same course. However, a Bronze Power Star will be got instead, and not counted as a normal Power Star.
Starlow appears in NSMB on Peach's team. Her stats have not been revealed.
Main article: Starlow (SSB8)
Starlow is a Downloadable character in Super Smash Bros. 8. She can be bought for $12.89. Her purpose in the game's story mode is unknown.