Inkwell Isle Three is widely regarded as the hardest of the three base-game isles, and the numbers back that up. It holds 6 main bosses — Cala Maria, Werner Werman, Captain Brineybeard, the Phantom Express, Dr. Kahl’s Robot, and Sally Stageplay — whose regular-mode HP ranges from the Phantom Express’s 1350 total up to Cala Maria’s 2500 and Dr. Kahl’s 2075. Several of these are multi-component fights, so the HP you see is often split across separate targets. Every figure below is taken from cuphead-bosses.json.
Cala Maria — 2500 HP across 3 phases
Cala Maria rules High Seas Hi-Jinx! with 1900 / 2500 / 3000 HP over 3 phases. Her moveset is Ghost Pirate Belch, Fish Squish, Companion Call, and Stone Gaze, backed by a huge minion roster: Red Fish, Yellow Fish, Ghost Pirates, Seahorse, Turtle, Pufferfish, Electric Eel, Hair Snake, and the Petrifying Poltergeist. Parryable: Puffer Fishes, Fire Fishes, and Electric Eels’ Bullets. Her phase-two Stone Gaze is the run-ender, so learn to break line of sight early.
Werner Werman — 2000 HP and the rat mech
Werner Werman is the Murine Corps boss with 1500 / 2000 / 2100 HP over 3 phases. His moveset is Cherry Bombs, Scrap Attack, Charge Attack, Flame Cannons, Bottle Caps, and Ghost Orbs (Spectral Rats). His minions include Katzenwagen and the Spectral Rats, the latter carrying 34 / 30 HP. Parryable: Gum, Spring Boards, and Ghostly Orbs. His phase-two scrap-mech form is where the 2100 Expert total bites hardest.
Captain Brineybeard — 1200 HP with a summonable ship
Captain Brineybeard sails Shootin N’ Lootin with 1000 / 1200 / 1400 HP over 4 phases. His moveset is Octo Shot and Sea Summon, and he calls minions including The Ship (264 / 448 HP), Octopus, Barrel, Squid, Shark, and Dogfish. Parryable: Octopus blobs and Laser. The Ship is itself a minor boss fought within his level, so treat Brineybeard as a two-stage target: the pirate then his vessel.
The Phantom Express — a 1350 HP train of four
The Phantom Express is Railroad Wrath’s boss and a four-component fight over 4 phases, totalling 1080 / 1350 / 1350 regular HP. The component values are:
| Component | Phases | Regular HP |
|---|---|---|
| Blind Specter | 1 | 425 |
| The Conductor | 1 | 325 |
| Lollipop Ghouls | 1 (×2) | 200 |
| Head of the Train | 1 | 200 |
| Total | 4 | 1350 |
Its moveset is Eye for an Eye (Blind Specter), Skeletal Slam (Conductor), Blazin’ Beams (Lollipop Ghouls), Flaming Bone Wheel and Fire Flurry (Head of the Train). Parryable: Ingots, Platform edges, Spook Skulls, and the Head of the Train’s Tail. The Head of the Train itself carries 200 / 200 HP and is not fought in Simple Mode.
Dr. Kahl’s Robot — 2075 HP, the isle’s heavyweight
Dr. Kahl’s Robot stomps Junkyard Jive! with 1250 / 2075 / 2640 HP over 3 phases — the second-highest regular HP on Isle Three, behind only Cala Maria’s 2500. His moveset is Laser Beam, Screw Shotgun, Magnet Hand energy cannon, Homing Bombs, and the Red/Blue Gem. Parryable: the Cylindrical bot and Diamond Shards. The jump from 1250 Simple to 2640 Expert shows how brutally his damage check scales.
Sally Stageplay — 1400 HP over 4 phases (1700 secret)
Sally Stageplay performs in Dramatic Fanatic with 1100 / 1400 / 1700 regular HP (plus a 1750 / 2100 secret-phase variant) over 4 phases. Her moveset is long: Parasol Corkscrew, Fan Trap, Flying Kiss, Warp, Baby’s Bottle, Ruler Throw (secret), Windup toy, Meteor, Lightning, Big Wave, Wheel of Flames (secret), Raining Roses, and Spinning Parasol. Parryable: Flying Kiss, Ruler (secret), Meteor Star, and Rose. The wiki notes her secret phases “add a deity-form finale that pushes her past 2000 HP on Expert.”
Mini-bosses and support enemies
Isle Three also caches two minor bosses and one component worth knowing: Katzenwagen at 740 / 777 HP (Murine Corps), The Ship at 264 / 448 HP, and the Head of the Train at 200 / 200 HP. The Spectral Rats that Werner summons sit at just 34 / 30 HP, and the Fat Demon adds 42 / 50 HP in later Hell fights. These numbers explain why Werner and the Phantom Express feel like multi-target endurance tests.
| Mini-boss | Level | Simple | Regular | Expert |
|---|---|---|---|---|
| Katzenwagen | Murine Corps | — | 740 | 777 |
| The Ship | Shootin N’ Lootin | 264 | — | 448 |
| Head of the Train | Railroad Wrath | 200 | 200 | — |
Target priority on multi-component fights
Three of the six Isle Three bosses are not single targets. The Phantom Express forces you through Blind Specter (425), the Conductor (325), the Lollipop Ghouls (200×2), and finally the Head of the Train (200), and you cannot skip ahead. Captain Brineybeard pairs his 1200 HP with The Ship’s 448 Expert HP, so your damage must carry across both. Werner Werman leans on Katzenwagen (777 Expert) and the 34 / 30 HP Spectral Rats he spits out. The practical rule: on component fights, damage the active target as fast as possible rather than hoarding a super, because the next component arrives on a timer you do not control.
- The boss roster guide places all six in the 41-fight ranking.
- Came from Isle Two? The Isle Two guide covers the six before this isle.
- The parry guide lists Cala Maria’s Puffer Fish and Dr. Kahl’s Diamond Shards as key parries.
- The expert mode guide shows Dr. Kahl hitting 2640 HP on Expert.
- The tips-and-tricks guide covers multi-component target priority.
- The common mistakes guide flags the Phantom Express component order.