Spike Top

Spike Tops are similar to Buzzy Beetles, except their shells are red and have a single spike projecting out of the top, making them impossible to be jumped upon, while still being resistant to fire.

Super Mario World
They first appeared in Super Mario World, where they would crawl around walls and jump down whenever Mario approached them. They could only be destroyed by a Cape Feather, Shell, Starman, or by having Yoshi eat them.

Super Mario Bros. 3: Super Mario Advance 4
Spike Tops appear in the E-Reader levels of Super Mario Bros. 3: Super Mario Advance 4, a Gameboy Advance remake of Super Mario Bros. 3. In the game they attack just like they did in Super Mario World.

New Super Mario Bros.
They return once again in New Super Mario Bros., with the same attack pattern from Super Mario World. A Shell, Starman, or Mega Mushroom could defeat them.

New Super Mario Bros. Wii
They also appear in New Super Mario Bros. Wii, mostly in World 2-3. They can be defeated by a Starman, Shell, hitting a block from below with the Spike Top on top of the block, or Ground Pounding the block with the Spike Top on the bottom. Through hacking methods, it is also shown that Yoshi can completely eat Spike Tops, and safely jump on them (not affecting the Spike Top though) as well.

Paper Mario
In Paper Mario, Spike Tops appear as enemies in Mt. Lavalava.

Paper Mario: The Thousand-Year Door
In the sequel, Paper Mario: The Thousand-Year Door, they are blue, with Red Spike Tops appearing as a sub-species.

Super Paper Mario
Blue-shelled Spike Tops make a reappearance in Super Paper Mario. Due to this game being more of a 2D or 3D side-scrolling adventure and not a turn-based RPG they have the same attack patterns as in the regular installments of the Super Mario series.

Super Princess Peach
In Super Princess Peach, it refers to Spike Tops as Mecha-Spike Tops. Despite this name, the Spike Tops of Super Princess Peach look no different than Spike Tops of other games, and therefore do not appear to be mechanical. Super Princess Peach also introduces an angry variety, the Mad Mecha-Spike Top, which can stretch out its spike to attack foes. They could only be defeated by using Rage or Poundbrella.

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