Bob-ombast
From the Super Mario Wiki
Bob-ombast is an attack that Bobbery learned in Paper Mario: The Thousand-Year Door. This attack is one of the most powerful attacks any partners that any are capable of, but it costs nine FP. Bobbery can only use this attack after being leveled up to the Ultra Rank. The player must rapidly tap the A button to fill the gauge as much as possible. This attack is similar to Bombette's Mega Bomb from the first Paper Mario.
