Buzzy Beetle

Buzzy Beetles are blue shelled, tortoise-like creatures commonly found in underground locations, such as caverns and ruins. Buzzy Beetles first appear in Super Mario Bros. as infrequently encountered enemies.

Description
Buzzy Beetles have powerful shells that are powerful enough to resist fireballs. Despite their name, they resemble more of a Koopa than a beetle. Like Koopas, Buzzy Beetles will hide inside their shells when jumped on. Their shells can be used to kill other enemies and swim better (Super Mario World).

Appearances
Aside from making a small appearance in the Japan-exclusive anime Super Mario Bros.: Peach-Hime Kyushutsu Dai Sakusen!, Buzzy Beetles have been relatively obscure in mediums outside the video games.

Super Mario Bros.
Buzzy Beetles first appear in World 4-2 in this game. In World 3-4, there is a False Bowser which is actually a Buzzy Beetle disguised as one. Like Koopa, Buzzy Beetles hide in their shell when jumped on. Interestingly despite a Buzzy Beetle being immune to fireballs, this one isn't immune to one.

Paper Mario series
In the first two games in the Paper Mario series, Buzzy Beetles are tough and durable. They have a high defensive but can be flipped by a jump or quake hammer attacks. After their defense has been dropped to zero, Buzzy Beetles have only four hit points. Variations of Buzzy beetles appear in the RPG series such as spiked beetles.

Mario Party 8
In Mario Party 8, Buzzy Beetles act as weapons in the battle minigame Glacial Meltdown, in which players use them to stun other opponents in battle.

Super Mario World
In Super Mario World, Buzzy Beetles were somewhat frequent in cave levels, but almost never were found outside of a cave. Their shells are harder then Koopa-football-player armor/pads, which do succumb to Mario's Fire Flower abilities.

New Super Mario Bros.
In New Super Mario Bros. they appear only in cave levels and often are seen walking on the ceiling and when you walk underneath them they will drop down and they will roll like a Koopa Troopa Shell. Also when one is on the ground they function like Red Koopa Troopas.

They also appear on cards in the Minigame Memory Mash in Mario Party DS.

Sprites
Buzzy Beetle