This gigantic ship is the mother ship of the Haltmann Works Company.
It came to Pop Star to harvest it's natural resources.
It released it's crew to mechanize the entire planet, drilling it's five anchors into the planet's surface!
Meta Knight and Dedede attempted to take out the Access Ark, but failed.
Kirby also made an attempt that ended up successful!
While the planet was mostly mechanized, Pufftop, Floralia and the Amiy archipelago were all spared.