From the Super Mario Wiki
Rob-ombs are a stronger variety of Bob-omb found in Super Mario RPG: Legend of the Seven Stars. They can often be found walking in simple patterns in the stairwells of Booster's Tower. Also, Booster himself keeps a personal store of Rob-ombs on his private train. Like other Bob-ombs in the game, Rob-ombs can only attack by self-destructing, and damaging an opponent.
Names in other languages
|pun on "Bomuhei" (Bob-omb) and "hai" (high)