Bob-ulk

Bob-ulks are the largest of the Bob-omb species, and are purple. They are also the most powerful, and the most armored. 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. To attack, they first charge themselves up, and then they explode after a few turns. If another explosion occurs, they explode with them. Oddly, Goombella says that they are the biggest Bob-ombs she has ever seen, however their slightly weaker sub-species, Bulky Bob-omb is a tiny bit larger in the Tattle Log. Dark Fawful Bombs and "Bob-ulks" have a similar look.

After lighting their fuses, they raise their defense by three. On the third turn they raise their attack, and then charge themselves before exploding.