From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Boom_Stomper&oldid=2082116"
Boom Stompers are enemies from Kid Icarus: Uprising resembling a large seed made of rock. They are fairly resilient to damage, slow moving, and attack by slamming their body into the ground.
Boom Stompers also appear in Super Smash Bros. for Nintendo 3DS as Smash Run enemies. Like in the original game, they can slam their body into the ground. Their attacks can also break through shields. The leaf on their heads is most susceptible to damage.