This adventure, included in Mario & Luigi: Superstar Saga + Bowser's Minions, develops alongside and with the main Mario Bros. story. It involves Bowser's minions battling the enemies of the Beanbean Kingdom to rescue Bowser, after he is knocked out from the Beanbean Border, led by Captain Goomba. (Mario & Luigi: Superstar Saga + Bowser's Minions belongs to Nintendo. Pokémon belongs to Game Freak.)

The evil Bowser consumed Mario, Luigi and Co. Now they are trying to get out, as well as help Bowser fight the evil Fawful, who has taken over Bowser's Castle, as well as Princess Peach's. (Mario and Luigi: Bowser's Inside Story + Bowser Jr's Journey belongs to Nintendo. Pokémon belongs to Nintendo. Sonic the Hedgehog belongs to SEGA.)

While Bowser is occupied during the main story, this story sees Bowser Jr. on an adventure to cure the blorbs himself after it causes numerous minions to balloon up to an immobile state. (Mario & Luigi Bowser's Inside Story + Bowser Jr.'s Journey belongs to Nintendo. Pokémon belongs to Game Freak. Sonic the Hedgehog belongs to SEGA.)