|First Appeared In||Super Mario Kart|
|Latest Appearance||Mario Party 9|
|Signature Item|| Koopa Troopa|
The Green Shell is a common item in the Mario Kart Series. It always shoots in a straight line and they do not home in on an opponent. The Green Shell is able to ricochet off of walls but only for about five times before it does break. In Mario Kart 64, it doesn't break but will keep going until it falls off the track or it hits an opponent or another item. Sometimes the Green Shell will come in triples and circle around the kart until all three are shot. They can be used as a barrier as well for most items.
 Super Mario Series
 Super Mario 3D Land
Green Shells would appear in Super Mario 3D Land. They could be used for hitting enemies when Mario kicks the Shell. They can't be picked up and if Mario gets in the way, he will get hit as well.
 Mario Kart Series
Green Shells are used as projectile weapons in the Mario Kart Series. Players can shoot them forward in a straight line to hit other opponents but unlike the Red Shell, they will not home in on the player and will rebound off walls. But after ricocheting a few times, they will disappear. There would also be a second Green Shell item called the Triple Green Shell(In Mario Kart 64, Mario Kart: Super Circuit, Mario Kart DS, Mario Kart Wii, and Mario Kart 7). When players use the triple Green Shells, three shells will circle around the player to protect them from other projectile weapons or any other racers who try to collide with the player with the shells. They will travel in a straight direction and bounce off walls multiple times before disappearing. They would be an exclusive item to Koopa Troopa, Paratroopa, Petey Piranha, and King Boo in Mario Kart: Double Dash!!. The Tripe Green Shells would also be carried instead of circling the kart.
 Super Mario Kart
In Super Mario Kart, it could be used in a form of a missile that fires directly in front of the player's kart, only changing its course when it hits a wall. Players can also leave it on the course by pacing it on the track behind them, similar to the Banana item. They are only destroyed when they hit a kart, another item, or fall off the track. It will also disappear when there is to many items on the track, the game will remove it. When a player hits a kart, they will cause the player to spin out before being able to move. The only CPU that uses the Green Shell is the Koopa Troopa, though it will be thrown like a Banana.
 Mario Kart 64
Green Shells would act similar in Mario Kart 64 but when a player holds the analog stick backwards, it will be fired backwards instead of being dropped. CPU players do not get this item in the game, as they will get Bananas, Fake Item Boxes, Stars and Thunderbolts. After being hit by a Green Shell, the player will flip over for two seconds before being stopped before being able to start.
The Triple Green Shell would be introduced in Mario Kart 64. When it is being used, it will have green shells act as a barrier for the player as they circle the kart. They can be used to project the player from projectiles or oncoming karts. They cannot be thrown backwards but can be thrown forwards.
 Mario Kart: Double Dash!!
Mario Kart: Double Dash!! would see the Green Shell become weaker as they could be destroyed after hitting the wall for only a certain amount. They could be fired backwards, as it moves slower than it does when being shot forwards. When hit by a Green Shell, a player will only flip once before they were allowed to move again. The Triple Green Shell would return in this game for Koopa Troopa, Paratroopa, King Boo, and Petey Piranha as a special item. They would be carried by the thrower of the team instead of circling the kart. It could also be shot backwards in this game unlike in Mario Kart 64. Racers who cannot obtain the Triple Green Shell, can obtain it by ramming into the others kart by using a Mushroom.
If a player who is holding a Green Shell, is hit by a Spiny Shell, Bob-omb, Thunderbolt, or Star, the player will drop the shells on the track. Yoshi Eggs can also drop this item at random when they break.
 Mario Kart 7
Green Shells return in Mario Kart 7 with the same function as past Mario Kart titles. They move slower when being shot backwards. Triple Green Shells also return in this game.
The Red Shell would appear for tennis gear for the Mii character in Mario Tennis Open. These gear can be unlocked after a match has been played and then purchased in the shop. The Red Shell would have a tennis gear for 900 coins, a uniform for 800 coins, wristbands for 100 coins and shoes for 850 coins.