Bowser X (Mario & Luigi: Dream Team)

Bowser X is an extra boss from the game Mario & Luigi: Dream Team. As with the previous title, Bowser X is a stronger version of Bowser; however, in this game, he appears as an X boss twice: once in normal form and again in giant form. He is the second normal X boss faced, and the final giant boss in the Battle Ring. Like the Bowser X from Bowser's Inside Story, neither forms of Bowser X have their palettes changed, unlike most other X bosses.

Bowser X
During the first battle against Bowser X, he is accompanied by Antasma X in his bat form. Bowser X uses all the same tactics Bowser does for this battle. He can spew purple waves of fire at Mario before launching a bigger flame attack that Mario must jump over. He can also roll up into his shell and chase Mario through the foreground, sending flames Mario must avoid while running, the red being avoidable by jumping while the purple must be avoided completely. Bowser X may try to sliding punch Mario to which he must counter with his hammer. Before punching, Bowser X may teleport behind Mario to catch him off guard.

Giant Bowser X
Bowser's giant form also appears as an X Boss in the giant boss battles of the Battle Ring. As with the previous battle, Bowser uses the same attacks, though a bit faster and some have slightly different patterns.