The final battle with King Olly is divided into the three phases. The first phase plays like a regular boss battle. King Olly deploys the Magic Circles of all four Vellumentals, and uses their abilities. Additionally, if Mario takes too long to organize the rings, King Olly will occasionally heal himself. If Mario takes a long enough time, King Olly will take longer to heal, and will heal for less HP.
King Olly begins the battle by turning into a random Vellumental. He can transform into the Earth Vellumental, and immediately charges to use Mega Earthquake next turn which deals approximately 150 damage, and cannot be dodged by using the Earth Vellumental, as Olly will simply lower the platform again. Instead, Mario must stand on a Vellumental Magic Circle and activate the Ice Vellumental, freezing King Olly and cancelling this attack. Mario can then use a rush attack from the 1,000-Fold Arms to deal heavy damage to him, reverting him to his original form.
King Olly can also transform into the Water Vellumental, and immediately charges Big Wave for about 180 damage, in addition to using Summon Spouts, which, unlike the original, rotate on their own during the lineup phase. Like with the regular Water Vellumental, Mario must use the Earth Vellumental to avoid this attack, then damage King Olly with the 1,000-Fold Arms.
King Olly can also transform into the Fire Vellumental. Olly will immediately after use Molten Feathers to release all of his wing feathers, taking almost half of his health as damage in the process, then charges an attack. If the feathers are not extinguished, he will use Hot Wings next turn to heal himself. Like with the regular Fire Vellumental, Mario must use the Water Vellumental to weaken King Olly and then rush attack with the 1,000-Fold Arms and pluck out his head feathers.
Finally, King Olly is able to transform into the Ice Vellumental. Initially, Olly will create an Ice Maze which shows only one safe route that must be memorized before it gets shuffled. The safe route will always involve walking over an ON panel and ending on either a Vellumental Magic Circle or a 1,000-Fold Arms Magic Circle, depending on the situation. King Olly will then encase himself in a block of ice and charge Ice Age, dealing about 150 damage. To negate this, Mario must use the Fire Vellumental to melt Olly, then use 1,000-Fold Arms attack to return him to his normal form.
If Mario is unable to defeat King Olly after all four Vellumental forms are defea