Every major Mewgenics boss falls to the same two-part plan: stack damage-over-time that no dodge or shield can stop, then choke the boss's action economy with crowd control and tight spacing. The fights that wall the most runs are Dybbuk, the dodge-and-possess wall that ends Act 1, and the House Bosses Pyrophina and Guillotina. Stacy is the odd one out, a boss you assemble yourself from a pre-fight menu. Learn the shared toolkit below, then drop into the per-boss breakdown for the fight in front of you.
The Plan That Beats Every Boss
Mewgenics bosses share a skeleton. Almost all of them have multiple actions per turn, a big health pool, and at least one mechanic that punishes a clumped, static team. Three tools answer that skeleton no matter whose name is on the health bar.
Damage over time ignores everything. Bleed, Poison, and Burn tick on the boss whether it dodges, retreats, hides behind Brace, or eats a shield. Most wall fights are a DoT check first and a damage check second. The one trap to respect: several bosses cleanse every debuff on a phase change, so learn each boss's reset and reload your stacks the instant it triggers.
Mobility beats raw stats. Because bosses act several times each round, a flat-footed cat can take two or three hits before you respond. Give every cat at least one movement skill and play hit-and-retreat: strike, then step out of the boss's reach before it answers.
Deny actions. Immobilize, Petrify, and Stun cut how many times a boss acts per turn, which defangs multi-action rounds faster than any amount of armor. Confusion is stronger still on the bosses that can hit themselves with it.
Prep starts in the breeding pen. The cats you walk in with decide the fight before the first turn, so breed for the element coverage and mobility each boss demands rather than scrambling on the day.
For the debuff mechanics behind every Bleed, Freeze, and Stun interaction, see the status effects guide. For why multi-action turns hurt so much, read the action economy guide.
Bosses Ranked by Difficulty
This ranking weighs how reliably each fight ends a run, not raw health. A 600-HP boss you can flood with water is easier than an 85-HP boss that backflips out of every swing.
| Rank | Boss | Where | HP (Normal) | The trap that ends runs |
|---|---|---|---|---|
| 1 | Dybbuk | Act 1, Boneyard finale | 85 | Dodges direct hits, possesses the cat that lands the kill |
| 2 | Pyrophina | House Boss, Act 2 | 600 | Fire-immune marathon in an arena that keeps catching fire |
| 3 | Guillotina | First House Boss | 400 | Two phases, and Digest instantly kills a swallowed cat |
| 4 | The Man in the Moon | Act 2, Moon route | 400 | A Brace puzzle that shrugs off normal damage |
| 5 | The Coven | Act 2, The Core | 350 | A four-turn ritual timer and a five-candle pentagram |
| 6 | Stacy | Act 3, The Lab | 100 | You hand-pick her buffs in the pre-fight event |
1. Dybbuk
Dybbuk is the wall that stops more first runs than any other fight. It backflips away from nearly every direct hit and, on the killing blow, possesses the cat that dealt it instead of dying. Brute-forcing the health bar fails: every swing whiffs and your action economy drains for nothing.
The solve is three moves. Stack undodgeable damage-over-time, since Bleed, Poison, and Burn tick no matter where it hops. Corner it with bodies and summons so Backflip has no open tile to use. Then control who lands the kill, because that cat gets possessed, so feed the fatal hit to a weak, low-movement unit you can put down in one follow-up turn. Hunters shine here: item:hunter-bramble-shot punishes the dodge and item:hunter-bear-trap pins it outright. Full phase-by-phase plan, including the pre-down trick that hands the possession to a throwaway body, is in the Dybbuk guide.
2. Pyrophina
Pyrophina is a 600-HP Kaiju House Boss that turns the arena against you. She is fire-immune, so Burn and fire spells are dead weight, and her kit floods the floor with lava: Fire Breath drops lava tiles, Volcano Stomp rings the edges with fire and cleanses her own debuffs, and at half health she casts Firestorm, a weather effect that rains fireballs for 5 magic damage and 2 Burn each.
You win by owning the environment, not by out-damaging her. Water is the answer. item:old-hose, item:rain-staff, and item:water-feeder keep your cats wet and douse the lava, and Earth spells convert fire tiles back to safe dirt. Keep the arena edges flooded so Volcano Stomp has nothing to ignite, and carry a cleanse for the Burn stacks Firestorm piles on during the second half. Beating her the first time drops the item:scalding-orb, the quest item that opens The Rift.
3. Guillotina
Guillotina is the first House Boss and the fight that teaches positioning. She comes to your House seven days after your first Boneyard clear, so use the timer to breed a real team. She runs 400 HP across two phases and acts several times per round, which means one mispositioned cat eats a chain of hits.
Phase 1 is a grab-and-throw loop built to drag your cats into walls. Spread out, leave an open tile behind each cat as an escape valve, and stack Bleed, Burn, and Poison. At 50% health she transforms, heals, gains max HP, and cleanses every debuff you stacked, so reload your DoT the instant she changes. Phase 2 swaps the throws for a kill loop: Swallow grabs a cat from up to ten tiles away, and Digest then kills it outright while healing her 25 HP. Never park a cat inside her reach after the transition. The full two-phase walkthrough and a four-cat team that covers it sit in the Guillotina guide.
4. The Man in the Moon
The Man in the Moon is a puzzle wearing a boss costume. The 3x3 head deals 0 damage and never moves, but it starts with +10 Brace and two mobile Moon Hands that each take only 1 damage per hit. Hammering it normally does almost nothing.
Crack the Brace instead of chipping it. Bait the hands toward the center, turn them with attacks, and trigger their dash so they slam into the head: each collision deals 20 damage and strips Brace temporarily. Alternatively, stand a cat in front of the open mouth to force a Head Consumption, which unlocks the "Stop Hitting Yourself" spell and guarantees the hands charge in. item:monk-bruise-monk, item:necromancer-bloodletting, item:butcher-hack, and item:psychic-reset all peel Brace without needing to crack it, and Stun stops it from regenerating. Below 25% health it calls in four B-Probers once, so save a sweep of crowd control for the closer. An Amoeba with Reap deletes the whole boss if you happen to have one.
5. The Coven
The Coven is a race against a ritual, not a health bar. The 3x3 body sits still on 350 HP and runs a strict four-turn cycle, Raise Body, Pestilence, Famine, then War, before the Death step summons Tormentor to finish the chant. Five Coven Candles, 50 HP each, sit on the points of an inverted pentagram, and every candle left lit empowers Tormentor.
Forget the body and work the candles. Water and Wind abilities snuff them instantly, infinite-range tools like Spit and item:collarless-blow-kiss reach the far points, and a persistent water weather effect such as Rain or Flash Flood keeps them dark while you mop up. Water tiles stop candles relighting outside the War step. Stun and Confusion interrupt the Raise Body action and stall the cycle, buying you turns to break candles or simply burst the body down before the ritual completes. The Famine step spawns 1-HP Flies, which are free kills for any reward-on-kill effect you brought.
6. Stacy
Stacy is the only boss you build yourself. A pre-fight event in The Lab hands you four choices, each offering three buffs for the Stacy Mutant plus a "No Thanks." Accept a buff and the boss gets stronger; decline it and your own cat eats a penalty instead. There are 256 possible versions of her, and the element choice in slot two decides the whole fight.
Read that element first and match it to the team you brought. Fire is the melee-safe pick, since you can play through the Burn with sustain. Ice freezes melee cats out, so take it only when your damage is ranged. Lightning punishes clumping, so it is fine for a spread, mobile roster. The Stacy Mutant's base is a soft 100-HP target, so hit hard and early before her stacked buffs matter. The full menu, every penalty, and which trades to accept are laid out in the Stacy guide.
The Road to Each Boss
Bosses gate your progress, one per milestone. The Path opens with Pebbles as your tutorial fight. Act 1 marches through a lineup of area bosses, Radical Rat, Queen Hippo, Boris, Chubs 'n' Nubs, and Spinnerette, before Dybbuk closes out the Boneyard. Guillotina is summoned to your House after that first Boneyard clear, and her drop, the item:throbbing-gristle, opens the route to the Throbbing King later on.
Act 2 splits into routes. The Coven holds The Core and the Man in the Moon ends the Moon path, while Pyrophina and Zaratana headline the Act 2 House Boss fights. Act 3 runs through The Lab, where Stacy waits, and on toward the endgame. The final stretch puts the Throbbing King, Chaos, and The Creator between you and a full clear.
Counters That Carry Every Fight
The same handful of tools answer most of the roster, which is why a flexible team beats a specialist one.
Damage over time is the backbone. Bleed, Poison, and Burn deal damage independent of a boss's health pool, dodge, or shield, so they keep working as fights scale on Hard, Crazy, and Impossible. Just respect the cleanses on Guillotina and Pyrophina and reload after the reset.
Element coverage decides the hard fights. Bring Water for the fire bosses (Pyrophina and a Fire-element Stacy), since it douses lava and grants dodge bonuses. Earth converts fire tiles to safe ground. Holy hits Ghost-typed Dybbuk harder than usual. Wind and Water both snuff Coven candles.
Class picks do the heavy lifting. The entity:hunter crowds the board with traps and ranged pressure that never enters grab range, which carries Dybbuk and any House Boss. The entity:necromancer floods the field with summons and its item:necromancer-reap can delete certain bosses outright. A entity:cleric keeps the team alive through multi-action turns. For who to breed and which collar carries each fight, see the class tier list and the best starter classes breakdown.
Build for damage over time, bring two elements, and keep a mobility skill on every cat. Do that and the bosses stop being walls and start being checkpoints.