Soda Star

The Soda Star (ソーダスター, Sōda Sutā) is a special star that appears in Super Mario-kun, in chapter 12 of Super Mario-kun volume 2.

Luigi gets intoxicated by a Volcano Lotus's powder, which turns him into stone. Yoshi and Mario forces the Plant to turn him back, but the Volcano Lotus reveals that it cannot, but says that maybe the Soda Star, located at the bottom of Soda Lake could do the trick. Later, Mario and Yoshi return from their trip from Soda Lake with a star and place it on Luigi, but only then they realized it is a normal starfish: the real Soda Star still rests on the bottom of the lake.