Alterna Space Center Lift
From Inkipedia, the Splatoon wiki
Alterna Space Center Lift is the 3rd section in the finale leading up to the final boss in Return of the Mammalians.
Description
To pass through this section in the finale, the player will have to ride a large platform that is going downward. The platform will reach a large gate and will not continue until all the enemies that have spawned are defeated. Enemies will also spawn while the platform is moving downward.