Pokémon Rumble U sends lost Pokémon toys through five major locations, then a battlefield reserved for post-game play. Each location is divided into areas, and each area into stages. Here is the complete list of stages, with their French names, based on Poképédia.

The official Pokémon Rumble U illustration.

Illuminated Amusement Park

Dream Gate

  • Battle on the Shore!
  • The Fiery Dance

Jungle Area

  • The Serperior Jungle
  • Watch Out for the Rockets!
  • Don’t Panic, Touch the Screen!

Adventure Area

  • Some Cotton Candy, Please!
  • Legendary Attraction
  • Beware of Absorption!

Mystery Area

  • Big! Huge! Gigantic!
  • Swarms of Pokémon!
  • The Haunted Amusement Park

Blue Sky Park

Water Hill

  • The Rainbow Park
  • Watch Out: Scorching Ground!
  • The Magikarp Trap

Prankster Plaza

  • Brawl in the Mist
  • Pokémon Attack!
  • The Pidove Set the Beat

Flower Garden

  • The Moonlit Mountain Festival
  • The Garden Guardian
  • The Garden at the End of Time

Transport Museum

Diorama Hall

  • All Aboard!
  • Rush Hour
  • Gear Transmission

Dining Car

  • Beware of the Sprinters!
  • Stock Up on Bonuses!
  • Boom! Boom! BOOM!

Vehicle Gallery

  • The Spiky Star
  • The Parade of Crawlers
  • The Clash of the Tynamo
  • Unstable Desert

Flight Simulator

  • Lights, Camera, Engine!
  • Watch Out for Ice!
  • Lord of the Sky

Mystic Forest

Green Plaza

  • The Forest of Four Seasons
  • Battle Royal!
  • Hide-and-Seek in the Forest

Mystic Lake

  • Protect the Lost Pokémon!
  • Everyone Sing Along
  • Double Cannon Launcher
  • Let’s Plant Trees

Sylvan Theater

  • En Garde, Giant Pokémon!
  • The Great Stage Cleanup
  • The Grand Concert

Pokémon Store

Entrance

  • The Duel of Destiny!
  • Battle Royal in a Cage!
  • The Secret Basement

Figure Collection

  • Shoot Everything That Moves!
  • The Free-for-All Battle
  • The Pichu Guided Tour
  • The Blade of Justice

Secret Storeroom

  • The Fighters on Ice
  • The Enemy Within
  • Walk the Tightrope

Sealed Door

  • Back to the Fold

Mysterious Battlefield

Assorted Battles

  • The Battle Tower
  • Come On, Audino
  • 1000 Combo!
  • His Highness Empoleon

Casual Battles

  • Unidentified Flying Object
  • Garden Maintenance
  • The Three Little Tepig
  • A Warm Welcome
  • The Power of Our Memories

Challenge Battles

  • Her Majesty of the Bugs
  • Battle Royal Without Limits!
  • Menace on the Horizon
  • Final Battle Royal!

The legendaries of the story

Over the course of the adventure, the toys face several legendary Pokémon, in this order: Celebi, Rayquaza, Meloetta in both its forms, then Kyurem, the final boss. After the story, the Mysterious Battlefield offers three additional series of battles.

Celebi.
Rayquaza.
Meloetta.