30 — Shadow Cosmopolis

Harder than Intrepid Cats — the wiki wants Crazed/Manic Cats at level 30+. Boraphim debuts, and Morning Rush Hour's synced Capies are a puzzle of their own.

A very hard close to the first thirty sub-chapters. The wiki's baseline recommendation is Crazed/Manic Cats at level 30 or above — particularly Crazed Wall/Manic Eraser and Crazed Whale/Manic Island — before walking in. The two stand-out stages: Morning Rush Hour, which is less a fight than a timing puzzle of syncing Capy spawns, and Subterranean Stalker, where waves of Pigeon de Sable and Brollow screen Mr. Moles and Tackeys — every annoying enemy of the last six sub-chapters, working together.

The debut is Boraphim, an Angel Bore with immense health, crushing attacks, more speed, and more knockbacks — the pusher archetype at its most refined. The closer is Lord of the Abyss.