Bob-ulk

Bob-ulks are the largest of the Bob-omb species, and are purple to boot. They are also the most powerful, the most armored, and basically the most everything. Bob-ulks are solely found in Paper Mario: The Thousand-Year Door's Pit of 100 Trials. They're related to Bulky Bob-ombs. "Bob-ulk" is word play on "bulk", meaning very large.