Shurubon

Shurubon (シュルボン) is an orb enemy in Mega Man Zero 2. They appear in the Forest of Notus (Burble Hekelot's stage) and jump up and down in pits. If Zero attempts to jump over the pits without destroying them, they will hit him, getting in the way of his jump and risking him to fall into the pit below. Once destroyed, another one will respawn soon afterwards. They drop a Cyber-elf when some are defeated.

Etymology
Its name is probably derived from Shururun, their movements are similar. Moreover, "bon (ボンッ)" is Japanese onomatopoeia of appearance or ignition.