Mario & Luigi?!
From the Super Mario Wiki
Mario & Luigi?! is a level in Blubble Lake in the Bowser Jr.'s Journey mode of Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey.
Bowser Jr. and Kamek are walking by Toad Town, with Bowser Jr. wanting to make a quick stop for the purpose of evil scheming; Kamek, who is normally on board for such plotting, says there's no time for stops. Shortly after, they spot Mario and Luigi, who were looking for the Star Cures. Bowser Jr. tries to pick a fight with them, and ends up in an argument with Starlow, despite claiming that they didn't have time for this either. Following a bit of further arguing, during which Starlow explains to Bowser Jr. that his father is busy working hard as well, both groups leave to carry out their respective tasks, and Bowser Jr. and Kamek end up in a battle soon after.