From the Super Mario Wiki
The Slowgo Candy is a Red Candy in Mario Party 8. It has the combined effects of the Sluggish Shroom and Mini Mushroom items from past Mario Party games. When used (and after some Stopwatch-like special effects), it lets the player hit a slow-moving Dice Block with 1-5 on it. It is usually more expensive than the Twice Candy, costing 10 or 15 coins. It has a picture of a green Dice Block on the wrapper.
The Slow Dice Block from Mario Party 9 has a similar affect to the Slowgo Candy.
Names in Other Languages
||Moviola Candy (the Moviola is an old device that allows a film editor to view film while editing; it's also used to indicate a slowed image sequence)