|First Appearance||Mario Kart Wii|
|Latest Appearance||Mario Kart ULTIMATE|
|Shrinks a player who has it long enough without passing it on.|
The Thunder Cloud is an item most commonly found in the Mario Kart series. It causes a cloud to grow over the player, after which a fifteen second clock starts ticking. The player can bump in to another racer to pass it on, but if he is unable to, then he will be shrunken after the fifteen seconds are up.
The Thunder Cloud appears as a normal item in Mario Kart ULTIMATE and is obtainable by everyone. It does the same effect as it did previously in Mario Kart Wii.