Blue Spiny Shells, also known simply as Blue Shells and Spiny Shells, are deadly items in the Mario Kart series. They are known to be explosive Koopa Troopa shells similar to Spiny Shells. Their special maneuver is to follow the leading player via flying to him, and then flying right into him/her. They could only be evaded with a boost of the Power Slide: the player need to be fast and must be good at timing. In earlier games, they hadn't wings, and will attack every player before the user. When they hit a victim, they will continue their path, going to the following, until reaching the leading.
They are NOT confused by Blue Shells: spikeless and wingless Koopa shells used as a Power-Up rather than a weapon.
The Blue Spiny Shell will be an item in SSBC.
The Blue Spiny Shell appears from Dry Bones Kart 64 to Dry Bones Kart Wii. It has wings and blows up the racer in first place, throwing him upwards. The Spiny Bombshell from Dry Bones Kart 7 onwards (which replaces the Blue Spiny Shell from previous installments) has the same effect.
Dry Bones Kart 64 (1998)
The Blue Spiny Shell's debut. In this game, the Blue Spiny Shell is the rarest item. This is one of two games to have the Blue Spiny Shell in its wingless form.
The Blue Spiny Shell's second appearance. This is the last game to have the Blue Spiny Shell in its wingless form, as its last few appearances have it in its winged form.
The Blue Spiny Shell's third appearance. This is the first game to have the Blue Spiny Shell in its winged form, and it is the flying equivalent to a Bob-omb.
Dry Bones Kart DS (2007)
The Blue Spiny Shell's fourth appearance. This item plays the same role as its previous appearances, and is uncommon.
Dry Bones Kart Wii (2010)
The Blue Spiny Shell's fifth and final appearance. This item can be obtained from 4th to 8th place.
- In RedYoshi's Universal Conquest, King Cloud's Lakitu Cloud can spit out Blue Spinies Shells, something regular Lakitu Clouds can't do.
- In Super Mario Ruby Quest, A Spiny Blue Winged Shell is a wearable item, enabling Mario to throw Spiny Blue Wingless Shells at enemies, and hover lightly. When he ducks, if an enemy bumps into his shell, the enemy will die.
- The Blue Spiny Shell and Boo are the only items to be absent from future Dry Bones Kart installments. The Blue Spiny Shell appears until Dry Bones Kart Wii prior to its absence.