When does Hollow Battle Interlink run?

Each weekly window features three Aniimo bosses on rotation.

Opening boss chests in the challenge mode requires Primegy energy. You can challenge the mode in a four-player team or enter solo. AI teammates fill any open slots on your team if you queue without a full party, but solo play produces lower damage output and yields fewer rewards than playing with human teammates.

Milestones and shop rotation

Accumulating total stars across routes unlocks milestone rewards. You can also assist other players in raising their star ranks, which awards support rewards scaled to the highest rank gain achieved.

The stock available in the Holo Shop rotates on a weekly schedule alongside the event cycle.