The Power of Koopa Troopas
From the Super Mario Wiki
The Power of Koopa Troopas is the first secret level of Gwarhar Lagoon in the Minion Quest: The Search for Bowser mode in Mario & Luigi: Superstar Saga + Bowser's Minions. In order to obtain this level, the player has to use certain amiibo to unlock it.
The level has three battles. The first one has two Koopa Troopas, two Koopa Paratroopas, three Starkisses, and a Koopa Paratroopa captain. The second battle has three Elite Pestnuts, two Koopa Paratroopas, three Starkisses, and a Koopa Troopa captain. The third and final battle has two Spinies, two red Koopa Paratroopas, three Starkisses, and a red Koopa Paratroopa captain.