Battle Stages:
Within Pokken Tournament there are a number of Battles Stages, ninteen to be exact, that a player can play matches in. Some of these areas are unlocked immediately after beginning the game, while others you must unlock during Gameplay. Each arena looks different from the next, and they each have a different shape and size.
Battle Stages (Alphabetic Order):
Blue Dome

The ruins of an ancient city said to have sunk to the bottom of the sea long ago. It is now housed in an underwater dome and serves as a battle arena.
Shape of Arena: Circle
Arena Width: 20 Meters
Arena Length: 20 Meters
Starting Distance: 11 Meters
Method of Unlocking: Defeat Nora In The Shadow Mewtwo Storyline
Dark Colosseum

A mysterious subspace rift created by Shadow Mewtwo's power. It is a cold, inorganic place with Shadow Synergy Stone shards visible in the background.
Shape of Arena: Circle
Arena Width: 20 Meters
Arena Length: 20 Meters
Starting Distance: 11 Meters
Method of Unlocking: Defeat Shadow Mewtwo In The Shadow Mewtwo Storyline.
Dark Colosseum (Final)

A mysterious subspace rift created by Shadow Mewtwo's power. The ominous force of the Shadow Synergy Stone sits heavy in the air.
Shape of Arena: Circle
Arena Width: 16 Meters
Arena Length: 16 Meters
Starting Distance: 7 Meters
Method of Unlocking: Defeat Shadow Mewtwo In The Final Battle Of The Shadow Mewtwo Storyline.
Diggersby Land

A tourist facility with the Digging Pokémon Diggersby as its theme. It is made of three areas: Futuristic, Classic, and Fantasy.
Shape of Arena: Circle
Arena Width: 16 Meters
Arena Length: 16 Meters
Starting Distance: 11 Meters
Method of Unlocking: Unlocked At The Beggining Of The Game
Dragon's Nest

A solemn area marked by a statue of the legendary Pokémon of the skies, Rayquaza. Sitting at the top of a treacherous mountain peak, the arena is known to exist by few.
Shape of Arena: Circle
Arena Width: 16 Meters
Arena Length: 16 Meters
Starting Distance: 11 Meters
Method of Unlocking: Defeat Jake In Shadow Mewtwo Storyline
Ferrum Dojo

The venerable Ferrum Dojo, host to daily training and official tournaments alike. Holy ground to Battle Pokémon and trainers seeking to improve themselves. This area can be in the form based on either Spring, Summer or Winter, cchosen at random when the games loads.
Shape of Arena: Circle
Arena Width: 18 Meters
Arena Length: 18 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked At The Beginning Of The Game
Ferrum Stadium

A stadium where the final match of Ferrum Battle is held. Located near a sacred lake in the forest, this arena is always filled with enthusiastic spectators.
Shape of Arena: Circle
Arena Width: 18 Meters
Arena Length: 18 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked At The Beginning Of The Game
Haunted House

An abandoned, old mansion. Ghost-type Pokémon like this place so much that they have made it their home.
Shape of Arena: Oval
Arena Width: 12 Meters
Arena Length: 20 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked After Playing A Match Here In The Ferrum League
Magikarp Festival

A hook-and-line Magikarp fishing boat with a great catch sailing under the cloudless skies. Hariyama stands on the bow waving a flag to celebrate a bountiful catch.
Shape of Arena: Circle
Arena Width: 14 Meters
Arena Length: 14 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked After Playing A Match Here In The Chroma League
Mystery Carnival

A strange, long-forgotten mansion. There appears to be a festival being held even though there aren't any people. The objects here seem to be staring back...
Shape of Arena: Circle
Arena Width: 20 Meters
Arena Length: 20 Meters
Starting Distance: 15 Meters
Method of Unlocking: Unlocked After Playing A Match Here In The Ferrum League
Neos City

The largest city in the Ferrum Region. Its infrastructure has been designed to facilitate the coexistence between Pokémon and humans.
Shape of Arena: Circle
Arena Width: 14 Meters
Arena Length: 14 Meters
Starting Distance: 7 Meters
Method of Unlocking: Unlocked At The Beginning Of The Game
Neos City (Night)

The largest city in the Ferrum Region. At night it gives off a more sophisticated atmosphere. The rain puddles in the road reflect the endlessly shining neon signs.
Shape of Arena: Circle
Arena Width: 20 Meters
Arena Length: 20 Meters
Starting Distance: 13 Meters
Method of Unlocking: Unlocked By Playing A Match Here In The Ferrum League
Old Ferrum Town

A historic old town, known as the "City of Water", with a nostalgic atmosphere. It features many famous landmarks, such as a large park, an arched gate, and a clock tower.
Shape of Arena: Oval
Arena Width: 20 Meters
Arena Length: 12 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked At Beginning Of Game
Old Ferrum Town (Winter)

A historic old town now blanketed in soft, white snow. Its winter scenery and yearly snow-scultpure contest attract many visitors.
Shape of Arena: Oval
Arena Width: 12 Meters
Arena Length: 20 Meters
Starting Distance: 17 Meters
Method of Unlocking: Unlocked By Playing A Match Here In Ferrum League
Phos Volcano

An area located in a cave inside a giant volcano. In addition to deposits of rare ores, it also contains the ruins of an ancient civilization.
Shape of Arena: Oval
Arena Width: 12 Meters
Arena Length: 20 Meters
Starting Distance: 15 Meters
Method of Unlocking: Unlocked At Beginning Of Game
Regi Ruins

Ancient ruins in a desert. Wall paintings and numerous Unown letters have been found here, making it an extremely important location for historical research.
Shape of Arena: Oval
Arena Width: 12 Meters
Arena Length: 20 Meters
Starting Distance: 11 Meters
Method of Unlocking: Unlocked By Defeating Walter In Shadow Mewtwo Storyline
Tellur Town

A town in a lush, green valley in the mountains. Ferrum Battles have long been held in the town plaza.
Shape of Arena: Circle
Arena Width: 18 Meters
Arena Length: 18 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked At Beginning Of Game
Tellur Town Autumn

A quaint, nature-abundant mountain village painted in rich fall colours. Here you can find Deerling and Sawsbuck in their Autumn Form.
Shape of Arena: Circle
Arena Width: 20 Meters
Arena Length: 20 Meters
Starting Distance: 17 Meters
Method of Unlocking: Unlocked By Playing A Match Here In Ferrum League
Speed Training Gym

A specialty gym for Ferrum Battles, with training programs for speed, power, and more to match your Pokémon's battle style. The arena has to different forms, and is chosen at random.
Shape of Arena: Circle
Arena Width: 18 Meters
Arena Length: 18 Meters
Starting Distance: 9 Meters
Method of Unlocking: Unlocked At Beginning Of Game