This level starts off with Kirby running off, leaving Peach or Zelda behind. After he leaves, Bowser comes and turns Zelda/Peach into a trophy. False Bowser appears, turns into Shadow Bugs, dissolves into the trophy, and creates a false princess. Upon that, Mario and Pit or Link and Yoshi (depending on which princess was turned into a trophy earlier), are seen running along the lake. Up on a hill the false princess aims at the duo with a Dark Cannon, but her Dark Cannon is destroyed by Pit or Link, who slices it in half. Pit/Link is then joined by his partner and the duo then prepare to fight the evil clone. A battle starts between either Mario and Pit vs. False Zelda or Link and Yoshi vs. False Peach.
After the battle, Mario or Link spots False Peach/Zelda dissolve and mistakes the clone as the real princess. Upon the confusion, Mario or Link runs up the hill and attacks Link or Mario in revenge for supposedly destroying their respective lovers. The next battle ensues: Mario and Pit vs. Link and Yoshi or vice versa. Upon defeat, the team who was not controlled by the player turn into trophies. King Dedede appears in Wario's Cargo, carrying the trophies of Ness, Luigi and Peach/Zelda; the latter of which is spotted by Mario/Link. King Dedede grabs the team of Mario and Pit or Link and Yoshi. When he successfully grabs them, Kirby appears and cuts the arm off the Cargo using Final Cutter and releases Mario and Pit or Link and Yoshi from their trophy forms. Then King Dedede turns around and drives straight into the group. Link or Pit shoots an arrow at the cargo and it falls apart, heading straight toward The Cave. The group of Mario, Pit, Link, Yoshi, and Kirby run near the Cargo, which starts the next part of the level. After that part of the level is complete, the group comes upon an entrance to a cave.
In the epilogue of the level, Ganondorf is shown in a control room where he is seen giving Bowser coordinates on where to find King Dedede's castle via computer screen.
- During the False Princess battle, Castle / Boss Fortress (Super Mario World / Super Mario Bros. 3) plays.
- During the Mario & Pit vs. Link & Yoshi battle, Battlefield plays.
- After the five heroes join, Step: The Plain plays.
- After the heroes find Dedede's hideout, Step: The Cave plays.
- This is the only level where the player can only pick two characters after completion.
- This is the only stage with a CPU ally.