MewGenius Answerbook Risk: High

Flushmaster Boss Guide

Safest opener, biggest mistakes, and the cleanest way to beat Flushmaster in Mewgenics.

HP 115 MV 6

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Fast answer

Read this first

Main idea

Claim open space away from hazard clusters; don’t start pinned near spiked rocks.

Biggest mistakes

Ending turns aligned with hazards: Flush converts position into collision damage wipes.
Overextending: teleport movement punishes chasing and exposes your backline to wave angles.

Winning line

You never allow a Flush line to push multiple cats into objects.
You keep a ‘safe lane’ (open space behind your units) before the wave hits.

Before you start

Quick-scan notes before you commit to the fight.

Quick scan

Safest opener

Claim open space away from hazard clusters; don’t start pinned near spiked rocks.
Kill or contain spawns early before the fight snowballs.

Bring / avoid

Bring: AOE or efficient cleanup
Useful: Anchor or anti-knockback options
Avoid: Single-target-only damage with no cleanup
Avoid edges, walls, and awkward angles that turn knockback into extra punishment.
Do not overextend; keep one unit ready to peel for the backline.

Fight plan

The safest way to approach the fight without reading a wall of text.

Decision-first notes

Win conditions

You never allow a Flush line to push multiple cats into objects. You keep a ‘safe lane’ (open space behind your units) before the wave hits. You pressure hard enough that Rest can’t reset the fight repeatedly.

Opener

Claim open space away from hazard clusters; don’t start pinned near spiked rocks.

Midfight

After each wave, re-center and re-spread; assume another Flush is coming.

Finisher

Commit burst when he cannot safely Rest; avoid late-game hazard attrition.

Detailed notes

Positioning, run killers, and loadout reminders.

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Run killers

Ending turns aligned with hazards: Flush converts position into collision damage wipes.
Overextending: teleport movement punishes chasing and exposes your backline to wave angles.
Ignoring sustain swings: Rest heals a lot and extends the hazard game.

Positioning rules

Treat every object behind you as lethal during Flush turns—stand with open tiles behind.
Spread laterally so one wave can’t line-push the whole team into the same hazard cluster.
Keep one responder to rescue a unit that gets pushed into danger.
Don’t chase teleport blindly; stabilize the center and force him to come to you.

Loadout hints

AOE or efficient cleanup

Anchor or anti-knockback options

Single-target-only damage with no cleanup

Source: boss-chp2.csv · Last tested: 2026-03-02 · Some move values are still being confirmed in live runs.

Detailed notes

Mechanics, background notes, extra item links, and deeper context.

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About Flushmaster

Wave knockback boss in a hazard-heavy arena; positioning is everything.

Type: Boss

Mechanics snapshot

Main mechanics

Teleport Knockback Collision Damage Summon/Spawn Map Hazards

Key triggers

Mass knockback wave can slam units into objects Arena has many immovable hazards (spiked rocks)

Moves to know

Flush

Sends a wave in facing direction; 0 damage but knockback ~10 tiles (collision damage becomes the real threat).

Loogie

~5 ranged damage, ~3 range, cannot target adjacent tiles (per notes).

Rest

Heals ~15 HP, gains Sleep 3 (per notes).

FAQ

Quick answers to the most common questions about this fight.

How do you beat Flushmaster in Mewgenics? ▾

Focus on the main loss pattern first: Ending turns aligned with hazards: Flush converts position into collision damage wipes. / Overextending: teleport movement punishes chasing and exposes your backline to wave angles.. Then follow the opener plan: Claim open space away from hazard clusters; don’t start pinned near spiked rocks..

What does Flushmaster do in Mewgenics? ▾

Wave knockback boss in a hazard-heavy arena; positioning is everything.

Where is Flushmaster found in Mewgenics? ▾

Flushmaster appears during a later home-base defense sequence after the Boneyard progression line.

What counters Flushmaster? ▾

Bring: AOE or efficient cleanup Useful: Anchor or anti-knockback options Avoid: Single-target-only damage with no cleanup