Editing Naval Piranha

Naval Piranha reprises the role of a boss in ''[[Yoshi's Woolly World]]'' and ''[[Poochy & Yoshi's Woolly World]]'', in this case being the boss of [[World 4 (Yoshi's Woolly World)|World 4]]. It appears in the level [[Naval Piranha's Sewer]]. Not including [[Baby Bowser]], Naval Piranha and [[Burt the Bashful]] are the only bosses from ''Super Mario World 2: Yoshi's Island'' to make an appearance in ''Yoshi's Woolly World'' and ''Poochy & Yoshi's Woolly World''. Naval Piranha's boss battle is the only one where there are no enemies or objects to turn into [[yarn ball]]s, which may be because the boss fight cannot be completed by using yarn balls. The arena is a long stretch of a red Warp Pipe, with a green warp pipe in the background and a network of purple warp pipes beyond that. There are six openings in the purple pipes, but none are in the middle of the screen behing the green pipe, creating two sets of three openings. As with the battle with Naval Piranha in ''Super Mario World 2: Yoshi's Island'', Yoshi has to walk into the arena rather than the door taking them directly inside. Naval Piranha is sleeping as Yoshi approaches. Once Yoshi arrives and Kamek orders Navel Piranha to attack, Kamek enlarges the plant with his magic. Naval Piranha wakes up and jumps to the green pipe in the background, pops out at full size, and calls forth its buds. Only Naval Piranha's spiky stem, it's open of its mouth, and the heads and stems of its buds, can hurt Yoshi. Everything else has no effect outside of Yoshi colliding with it, including the sides of Naval Piranha's head.

Naval Piranha attacks by ducking into its pipe, then appearing on side of the screen opposite of Yoshi. It fully extends itself across the ground to eat Yoshi. This can be avoided by running all the way to the opposite side of the arena, [[Flutter Jump|flutter-jumping]] over it, or throwing an yarn ball or [[Poochy Pup]] into its mouth. The latter will end the attack early. If Yoshi is eaten, Naval Piranha reels back off screen, pops out from the pipe, and spits Yoshi back onto the center of the red pipe. Only landing from this spit inflicts damage. Naval does the same if it misses or eats a yarn ball/Poochy Pup, but without spitting. Regardless, Poochy Pups used in this way return to Yoshi. Following this, four [[Bomb Guy]]s appear from the purple pipes in the background to throw a bomb each into the foreground. The middle pipe in each set of three is skipped. The buds hide during this attack. The Bomb Guy's bombs land on the ground then explode, giving Yoshi time to eat one. These bombs are core to the boss battle; the primary way to damage Naval Piranha is to spit a bomb into Naval Piranha's open mouth as it tries to eat Yoshi. The resulting explosion knocks the plant over. It flops onto the red pipe, leaving its belly button in Yoshi's plane and vulnerable to attack. The buds also droop over. Yoshi can jump on the belly button but bounces off. They must [[Ground Pound]] the belly button to deal damage. Naval Piranha slinks backward off the red pipe, then reappears from its green pipe. If left alone, Naval Piranha eventually recovers and repeats the process. Alternatively, many watermelon seeds from a [[watermelon]], ice breath from an [[ice watermelon]] or fire breath from a [[fire watermelon]] can knock over Naval Piranha during its eating attack. All of these have no effect on the belly button.