The Battle Ring is an optional area the player can access in Pi'ilo Castle once they beat the game. Here, the player can fight against the X Bosses, stronger bosses with enhanced stats and new colour schemes.
Battle Ring[]
| Class | Boss | Boss Name | Battle Fee | Rewards |
|---|---|---|---|---|
| 01 | 
|
Smouldergeist X | 100 Coins | 250 Coins |
| 02 | 
|
Dreamy Mario X | 150 Coins | 500 Coins, 2x 1-Up Deluxe |
| 03 | 
|
Bowser X and Antasma X | 200 Coins | 1000 Coins and Wellington Boots |
| 04 | 
|
Grobot X | 250 Coins | 500 Coins |
| 05 |    
|
Big Massif's Disciples X | 300 Coins | 1500 Coins and Supreme Hammer |
| 06 | 
|
Big Massif | 350 Coins | 2000 Coins and Perfect POW Gloves |
| 07 | 
|
Torkscrew X | 400 Coins | 1000 Coins |
| 08 | 
|
Mammoshka X | 450 Coins | 1500 Coins |
| 09 |  
|
Wigger X & Popple X | 500 Coins | 2000 Coins |
| 10 | 
|
Elite Trio X | 400 Coins | 2500 Coins, 4x Max Nuts and King Wear |
| 11 | 
|
Pi'llodium X | 450 Coins | 3000 Coins |
| 12 | 
|
Kamek X | 500 Coins | 3000 Coins, 4x 1-Up Deluxe and Perfect Bro Gloves |
| 13 | 
|
Antasma X | 550 Coins | 3500 Coins, 4 Max Candy and Legendary Wear |
| 14 | All Bosses + Bowser Jr | 600 Coins | 4000 Coins |
Giant Bosses[]
- Robo Drilldigger X
- Mount Pajamaja X
- Earthwake X
- Zeekeeper X
- Giant Bowser X
- All Bosses + Giant Mario
TRUE Battle Ring[]
| Class | Boss | Boss Name | Battle Fee | Rewards |
|---|---|---|---|---|
| 01 | |
Bowser Jr | 100 Coins | 1000 Coins |
| 02 | 
|
Dry Bowser | 150 Coins | 1000 Coins |
| 03 | 
|
King Boo | 200 Coins | 1000 Coins |
| 04 | Giant Mario | 250 Coins | 1500 Coins |
Trivia[]
- Several new bosses were added in, the ones that didn't have colour schemes originally now have new colour schemes.
- Dreamy Mario X's colour scheme is a reference to Wario, his archnemesis.
- Bowser X's colour scheme is based off one of his Smash 4 palettes. Antasma X's colour scheme is altered to be closer to his original X colour scheme.
- Kamek X and the Elite Trio X's colour schemes are inverse to RGB, being magenta, cyan and yellow.
- Kamek X's fight is based off the third one with his clones being cyan, yellow and black.
- Both the Real World and Dream World have 7 bosses each.
- Elite Trio X and Big Massif's Disciples X are the only bosses where the player fights multiple enemies at once. Their colour schemes are also based of the Super Famicom controller.
- Instead of a limited amount of turns, the player is graded on how long they took during each battle, much like Mario & Luigi: Paper Jam.
- The fights with Bowser Jr and Dry Bowser require the player to pay 1000 coins every time they want to fight them.