As the fourth boss of the game, Mega Titan guards the Mirror Shard in Carrot Castle. Kirby fights him right after making it through the castle's anteroom. His arena is different than others in the game, because flanking either side of the room are two electrical walls. Mega Titan attacks Kirby by firing one of his four fists at him, launching all four of them in succession, or firing them all at the same time. Mega Titan is only damaged by electrical attacks, so unless Kirby has Spark, Beam, or UFO, he will need to force Mega Titan to collide with the electrified walls.
If using the second method to damage the Mega Titan, it is recommended to use either Hammer or the hammer attacks included in Smash Bros., as these moves will knock Mega Titan back much more efficiently than any other Copy Ability, including the three provided right before the fight (Cupid, Cutter and Bomb). Mega Titan must be knocked back into an electric wall four times to end this phase. Upon depleting all of the health from the first form, Mega Titan's armor collapses. Right after, the mech's head, called Titan Head, rises from the wreckage and takes over, which begins the second phase of the fight. It only fires missiles at Kirby, and inhaling these gives no traits. As the armor is removed, all attacks will be able to damage the Titan Head. It has significantly lower health in this phase than in its first one.
Mega Titan appears in Kirby: Triple Deluxe in the form of a keychain.
Mega Titan is an egregious blue and silver robot residing in the throne room of Carrot Castle, and acts as the palace's defense system and protector of a Mirror Shard. He has a hard sapphire-colored metallic exterior and is capable of hovering. He has four rocket-propelled arms that float beside him that can shoot forward, either in a predetermined formation (e.g. one row) or randomly at will.
Mega Titan's head can function without the rest of its body. When in this state, this part has facial features that resemble those seen on Meta Knight's mask. It is a round silver head with two horns, small arms and tiny yellow eyes, and it has jet pack-like engines that help it float. Its head is also equipped with a missile-shooting cannon.
- Mega Titan is one of the few non-final bosses that only takes damage from certain copy abilities.