Dash Star

The Dash Star makes it's debut in Super Mario Galaxy 3 - Neverending Galaxies. The Dash Star transforms Mario into Dash Mario. Dash Stars look like Rainbow Stars. but are completley red. Dash Mario can travel distances at high speed. However, bumping into a enemy or a wall will cause Mario to loose the power-up and take damage. There is a comet focusing on this power-up, the Dash Comet. Dash Stars are not common, but not too rare. They have appeared in 7 galaxies, Hot Hot Desert Galaxy, Flip-Flop Beach Galaxy, School-Time Galaxy, a secret mission in Backyard Galaxy, a secret mission in Haunted Ghosts Galaxy, it's own galaxy Dash Star Galaxy and a secret mission in Mario 8-bit Challenge Galaxy. If it seems overpowered, it is actually the hardest power-up to control, practicing can take a while.

Trivia:

 * Dash Stars are the first fan-made star to join the category of star power-ups.
 * If you count the non-fiction Rainbow Star, it is the second star to join the category of star power-ups.
 * Dash Stars are the only power-ups (so far) to appear in a boat-load 7 galaxies!