Kingdom Hearts 3 has 14 Battlegates. This guide shows all Battlegate locations as well as the associated rewards for completing them, along with unique enemies that only spawn during in them.
Battlegates are extra arena fights that you unlock at the end of story. After beating the game you will see blue spheres show up on every planet, those are the “Battlegates”. They endgame enemy encounters that are a bit more challening than what you encountered during the story. When completed each one rewards a specific item, as well as a correspondingly numbered Secret Report that you can read in your Gummiphone. Secret Reports aren’t required for any trophies, but some of the Battlegates reward unique Synthesis materials which are required to earn the trophy Synthesist, and there are a few others with unique enemies that you need to defeat to complete the Adversaries section of the Gummiphone and earn the trophy Know Thine Enemy.
Each Battlegate has a difficulty rating out of 3 stars (3 being the hardest and 1 the easiest), and are marked as Complete once you finish them. You can replay them as many times as you want after that, though you are only awarded the extra item on first completion. They are a very good place to farm some other Synthesis items though as they can be repeated as much as you desire. They are also the best place to farm XP quickly and reach level 99.
Battlegate 1: Realm of the Gods – Courtyard
Difficulty: ★☆☆
Location: Olympus – Mount Olympus: Summit – Proceed up the stairs to the Courtyard, the Battlegate is just beside the large structure in the middle.
Reward: Fire Cufflink
Battlegate 2: Realm of the Gods – Apex
Difficulty: ★★☆
Location: Olympus – Realm of the Gods: Apex – Head into the large circular area through the gates behind Zeus, the Battlegate is right in the middle of the area.
Reward: Cosmic Belt+
Battlegate 3: The Neighborhood – The Old Mansion
Difficulty: ★★☆
Location: Twilight Town -The Neighborhood: The Old Mansion – Just outside the walled area of the mansion grounds.
Reward: Evanescent Crystal (Required for Synthesist)
Unique Enemy: The Nobodies – Sorcerer
Battlegate 4: Galaxy Toys – Kid Korral
Difficulty: ★☆☆
Location: Toy Box – Galaxy Toys: Kid Korral – Directly in front of you from the save point.
Reward: Megalixer
Battlegate 5: Galaxy Toys – Main Floor: 1F
Difficulty: ★★☆
Location: Toy Box – Galaxy Toys: Main Floor: 1F – Turn around from the direction it starts you facing and the Battlegate is just behind you, in front of the closed store doors.
Reward: Thunder Cufflink
Battlegate 6: The Forest – Wetlands
Difficulty: ★★☆
Location: Kingdom of Corona – The Forest: Wildflower Clearing – Turn around from the direction it starts you facing and head down the path in front of you. Once you reach the open Wetlands area turn right, and just over a rock into a lower area you’ll see the Battlegate.
Reward: Illusory Crystal (Required for Synthesist)
Battlegate 7: The Forest – Hills
Difficulty: ★☆☆
Location: Kingdom of Corona – The Forest: Tower – Turn around from the direction it starts you facing and head through the cave. When you come out the other side and see the Orange Flan head North-East to the top corner of the map. You’ll see the Battlegate right beside a tree.
Reward: Aero Cufflink
Battlegate 8: The Power Plant – Tank Yard
Difficulty: ★☆☆
Location: Monstropolis – Powerplant: Tank Yard – Head out the door to your left, then go up the grind rail on the left side. At the end you’ll find yourself in a large silo with the Battlegate in the middle.
Reward: Illusory Crystal (Required for Synthesist)
Unique Enemy: The Heartless – Demon Tower
Battlegate 9: The Labyrinth of Ice – Middle Tier
Difficulty: ★★☆
Location: Arendelle – The North Mountain: Gorge – Head into the portal that takes you to The Labyrinth of Ice, then take the elevator behind the portal down to the Middle Tier. Take the path all the way up to the top of the area, through the stairwell maze to the large rectangular room at the top, the Battlegate will be right in the middle.
Reward: Evanescent Crystal (Required for Synthesist)
Unique Enemy: The Nobodies – Berserker
Battlegate 10: The High Seas – Huddled Isles
Difficulty: ★☆☆
Location: The Caribbean – The High Seas: Huddled Isles – Get on your ship after and start moving clockwise around the outer edge of the island. Just before it starts curving around on the East-most side you will see a large cave, the Battlegate is inside on the beach.
Reward: Water Cufflink
Battlegate 11: The City – North District: Day or Night
Difficulty: ★★☆
Location: San Fransokyo – The City: North District: Day or Night – From the save point you will want to get on the train tracks directly above you, best done by climbing the nearby building. Once on them ride them all the way to the west edge of the city, where you’ll see the Battlegate sitting in the middle of the tracks before a tunnel.
Reward: Yin-Yang Cufflink
Battlegate 12: The City – North District: Day or Night
Difficulty: ★☆☆
Location: San Fransokyo – The City: North District: Day or Night – From the same save point as the last Battlegate head South-West and go up the large circular building. At the top on the Helipad you will see the Battlegate.
Reward: Blizzard Cufflink
Battlegate 13: The Badlands
Difficulty: ★★☆
Location: Keyblade Graveyard – The Badlands – From the save point turn around and head south, the Battlegate will be in the middle of the first area of the Keyblade Graveyard, right beside the portal that goes to The Final World.
Reward: Celestraid
Battlegate 14: The Badlands #2
Difficulty: ★★★
Location: Keyblade Graveyard – The Badlands – From the same save point head north, the Battlegate will be in the middle of the next open area.
Reward: Crystal Regalia
Unique Enemy: The Heartless – Dark Inferno
For more Kingdom Hearts 3 Guides check out our complete Kingdom Hearts 3 Wiki & Strategy Guide.
You’re actually forgetting Battlegate 0 which is found in the Keyblade Graveyard.