Cute Tail Fail
From the Super Mario Wiki
Cute Tail Fail is a level in Dimble Wood in the Bowser Jr.'s Journey mode of Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey.
The level has four battles. The first battle has one Big Tail Goomba, six Tail Boos, a Tail Boo first officer, and a Big Tail Goomba captain. The second battle has two Big Tail Goombas at the front, five Tail Boos in the middle, and a Big Tail Goomba first officer and captain in the back. The third battle has the seven Tail Boos, and a Tail Boo first officer and captain. The fourth and final battle has three Big Tail Goombas with the one in the middle having been infected with Malatone Formula:X, four Tail Boos, and a Tail Boo first officer and captain.