Panser

Pansers are enemies commonly found in the land of Subcon in the game Super Mario Bros. 2. They, along with Pokeys, are the only known hostile plant species in Subcon. There are three types of Pansers: red, green, and blue/pink. The red version will stay in one place and shoot three fireballs in Mario's, Luigi's, Toad's, or Princess Peach's direction, the green will patrol an area and shoot fireballs straight up, and the worst, the blue/pink, will chase Mario or his friends and shoot three fireballs. These enemies cannot be ridden, and are sometimes an excessively annoying enemy.

They're like the Volcano Lotus and the Lava Lotus.

Trivia
Excluding Wart, Pansers were the only enemy from Super Mario Bros. 2 to not appear in The Super Mario Bros. Super Show!; though they were possibly amalgamated with Piranha Plants, which could exhale fireballs, much like Pansers, on the show.