Battle Ring (Mario & Luigi: Dream Team)

Battle Ring is an area in Pi'illo Castle that Mario and Luigi can access in Mario & Luigi: Dream Team. The Battle Ring is where the plumbers face X bosses, harder versions of bosses they have battled before. The X bosses that can be fought in the Battle Ring are:

Normal X Bosses

 * Class 1
 * Grobot X
 * Class 2
 * Bowser X & Antasma X
 * Class 3
 * Torkscrew X
 * Sandoon X
 * Flounderflage X
 * Class 4
 * Big Massif X
 * Hooraw X
 * Class 5
 * Mammoshka X
 * Block Monolift X
 * Class 6
 * Elite Trio X
 * Class 7
 * Pi'illodium X
 * Mini Pi'illoid X
 * Class 8
 * Antasma X
 * Antasmunchie X
 * Battle Medley
 * All previous classes and Bowser Jr.

Giant X Bosses

 * Robo-Drilldigger X
 * Mount Pajamaja X
 * Earthwake X
 * Zeekeeper X
 * Giant Bowser X
 * Giant Medley: All previous giant bosses.

Trivia

 * Bowser Jr. is the only boss without X in his name.
 * Grobot X is a required boss, as beating him after the second trip to Dream's Deep awards the bros. the Zeekeeper's Feathers, which are required to make the Ultibed.