Bob-ulks are humongous purple Bulky Bob-omb, Bob-ulk is the toughest Bob-omb in Paper Mario: The Thousand-Year Door. Like the Bulky Bob-omb, a Bob-ulk will charge up its defense and attack power before fatally self-destructing, causing a damage total of 16. Also like Bulky Bob-omb, if they are hit by a bomb or fire-related attack or item, they'll instantly explode. Mario will still take a fair amount of damage, but this method is wise to use, especially if you're fighting four at one time. They are only found in the Pit of 100 trials.
 Bob-ombs 
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| Species: Bob-omb | Bulky Bob-omb | Bob-ulk | Bob-omb Buddy Characters: Admiral Bobbery | Bobby | Bomberto | Bombette Bub | General White | Goldbob | Jerry Lucky | Master Crash | Pa-Patch | Sylvia Groups: Bob-omb Squad |