The last island has come into view! Just think of it! You defeated the Skullord! Necrodeus must be on this next island. Now, onward! To the final fight! Return to me safe and sound!”
Necro Nebula is the final island in Kirby Mass Attack, coming after Volcano Valley; however, it can only be accessed after the player has collected all of the Rainbow Medals. It has a total of five stages; all of which are boss stages. The final boss is Necrodeus.
Necro Nebula is unique in having no regular stages; all of the stages are the bosses from the previous islands. Also, each boss has a different, purple color scheme. Another difference is that each boss only requires one Kirby; and to counteract this, fruits can now be obtained during the battles. Each boss now has more health as well. Every time the player defeats a boss, one of the four torches surrounding the last level are ignited. Once all of the torches are ignited, the last level becomes available. When the player first comes to the island, Skullions are patrolling it, effectively trapping the player on the island. Upon defeating all the bosses, the Skullions cease their patrol.