Despite helping Mario to see underwater, they can also hurt him if Mario touches them. Jellybeams can be defeated with fireballs or a Star. Mario can also freeze them, causing them to stop moving, but they will continue to illuminate the water. Their movements can be compared to a Thwomp, although rather than slamming down on the ground when Mario approaches, they automatically move up and down slowly.
* - Indicates downloadable content in Mario Kart 8 • ** - Indicates content available in version 1.6.0 of Mario Kart 8 Deluxe • - Indicates exclusivity to Mario Kart 8 • - Indicates exclusivity to Mario Kart 8 Deluxe