🐾 MewGenius
Breeding planner Stat inheritance Stimulation & Comfort IC risk House upgrades

Mewgenics Breeding Simulator

A stat-first Mewgenics breeding planner for players who want more than a loose trait guess. Compare both parents, estimate base-stat inheritance, review ability carry, pressure-test Stimulation and Comfort, and spot inbreeding coefficient risk before you commit a generation.

Jump to simulator How it works FAQ House upgrades Luck calculator → Mutation database →
What it does

Turns breeding inputs into planning outputs

This page is built for decisions, not just explanation. It helps you compare pairings, see likely pressure points, and decide whether a line is worth investing in.

What it models

Stats, room pressure, abilities, IC

The simulator centers on base stats, Stimulation, Comfort, active and passive inheritance, disorder rolls, and continuous inbreeding coefficient risk.

Who it helps

Players planning cleaner generations

Use it when you are choosing between pairings, tightening a breeding room, pushing stronger offspring, or trying to grow a line without letting risk spiral.

Step 1

Enter both parents

Add the two parent cats, their 7 base stats, active abilities, passive, and disorder status. This creates the actual pairing baseline.

Step 2

Set room pressure + risk

Tune Stimulation, check Comfort, account for overcrowding and poop, then enter your inbreeding coefficient.

Step 3

Read the pairing result

Review expected stat pressure, ability inheritance, disorder risk, and the optional Mendelian trait layer to decide whether the pairing is efficient, risky, or worth delaying.

🧬 Breeding Simulator

Refactored around a stat-first planning model. Use it to compare parents, read room quality correctly, estimate ability carry, and keep IC-based risk visible while you build stronger generations.

Interactive tool · shareable state
Refactored for a stat-first breeding planner: base stats, Stimulation, Comfort, continuous inbreeding coefficient, ability carry, and disorder rolls are modeled directly. The Mendelian trait block is optional and no longer guesses from free text.

Parent A

Only base stats should go here. Gear / class bonuses are intentionally excluded.

Parent B

Only base stats should go here. Gear / class bonuses are intentionally excluded.

Breeding room

Comfort and Stimulation now have distinct jobs: Comfort governs room stability, while Stimulation governs quality.

Optional Mendelian trait planner

One trait per line: "Trait Name | AA | Aa". This is now explicit genotype planning instead of free-text guessing.
Output columns are generic: AA / Aa / aa, so recessive goals like Lucky are represented by the aa column.
Better-stat chance
60.0%
Per unequal stat, this is the chance the kitten gets the higher parent's base value.
Expected avg base stat
4.54
Expected share of the stronger-parent ceiling: 85.9%
Room comfort
5
Comfort is positive enough to support a dedicated breeding room.
IC state
Minimal
Current IC: 0

Base-stat inheritance forecast

Each stat is inherited independently from one parent or the other; the room's Stimulation only shifts the odds toward the better value.
StatParent AParent BHigher-value chanceExpected kitten statFavored source
Strength
STR
6360.0%4.80Parent A
Dexterity
DEX
4660.0%5.20Parent B
Constitution
CON
5460.0%4.60Parent A
Intelligence
INT
3560.0%4.20Parent B
Speed
SPD
5460.0%4.60Parent A
Charisma
CHA
2460.0%3.20Parent B
Luck
LCK
4660.0%5.20Parent B
* Equal parent values are shown as 100% because either source yields the same result.

Ability inheritance

Active and passive inheritance are modeled from Stimulation-driven public formulas.
1st active
100.0%
Chance to inherit at least one active ability from the parental pool.
2nd active
27.0%
Chance to inherit a second active ability.
Passive
55.0%
Regular passive inheritance chance.
Expected actives
1.27
Expected active-ability count contributed by the two active rolls.
Active pool
Snipe · Curse
Passive pool
Skill Share+ · Lucky
Skill Share+ carry
No guaranteed Skill Share+ passive carry configured.

Disorder & birth-defect risk

This uses flat per-parent disorder rolls plus IC-based birth-defect rolls.
Inbreeding risk
Minimal
IC 0
Parent A disorder
0.0%
No parent-side disorder roll enabled.
Parent B disorder
0.0%
No parent-side disorder roll enabled.
Birth-defect disorder
2.0%
Extra disorder roll after inheritance, scaled by IC.
Birth-defect parts
0.0%
No birth-defect part roll at this IC.
Use fresh strays or branch swaps to keep IC low. Once IC climbs, the disorder roll and part-defect roll stop being niche edge cases and become real planning constraints.

Room readout

Comfort and Stimulation are intentionally separated so the UI mirrors how the public formulas behave.
Comfort status
Breeder-friendly
Total comfort: 5
Overcrowding penalty: -0
Poop penalty: -0
Planning notes
  • Stimulation affects quality, not whether cats feel like breeding.
  • Comfort should stay positive; negative comfort pushes the room toward fights.
  • Going from 0 to 50 Stimulation helps, but it is not magical perfection.
  • At very high IC, stat gains can be outweighed by birth-defect risk.

Mendelian trait planner output

Use this for explicit trait planning only. It is separate from the base-stat engine.
TraitABAAAaaaExpressedCarrierRecessive
Giant JawAAAa50.0%50.0%0.0%100.0%50.0%0.0%
LuckyAaAa25.0%50.0%25.0%75.0%50.0%25.0%
Frail BonesAaaa0.0%50.0%50.0%50.0%50.0%50.0%
Data note: this version is no longer a free-text trait guesser. It is a stat-first breeding planner designed so the core math can stay aligned with public formulas while you iterate on roster import, family-tree IC, and richer ability pools later.

Why this page is useful

Many breeding pages stop at explaining concepts. Use this simulator when you want to compare pairings quickly. This simulator is meant to compress the mechanical thinking into one screen: who is stronger, what the room is doing, how much IC pressure you are taking on, and whether the pairing still makes sense once risk is visible.

How to use it well

The best use case is not “predict every kitten exactly.” The best use case is comparing choices. Run several pairings, keep the room variables stable, and look for the pair that gives you better stat pressure or ability upside without dragging IC and defect risk too high.

How it works

How this Mewgenics breeding planner works

This page is built as a Mewgenics breeding simulator in the practical sense: it helps you compare pairings using the variables players actually care about when planning a line. Instead of treating the page as a loose trait checklist, the model is structured around four layers: base stats, room pressure, inheritance side systems, and optional trait planning.

1

Base stats are the center of the page

The first job of the tool is to compare the parents as stat packages. This is why the main inputs start with the seven core stats rather than a free-form trait box.

When you are trying to push stronger cats, your real question is usually not “Does this pairing feel good?” It is “Which parent pairing puts more pressure on the kitten toward better values?”

That is why the largest output on the page is the Base-stat inheritance forecast. It is the table you should read first.
2

Stimulation and Comfort do different jobs

One common mistake on breeding pages is to mash all room factors together. This page does the opposite.

  • Stimulation pressures the pairing toward better outcomes.
  • Comfort tells you whether the room is stable enough to support breeding cleanly.
  • Overcrowding and poop are shown as visible penalties instead of hidden assumptions.

A room can be comfortable but mediocre for quality, or stimulating but too messy to trust. Seeing both values side by side is more useful than burying them in a single room score.

3

IC risk is easier to work with as a gradient

Instead of forcing every pairing into broad labels, this page uses a continuous inbreeding coefficient.

That makes the risk output more flexible when you are running a long lineage, swapping branches, or trying to squeeze value from a line without drifting into obvious self-sabotage.

This is especially useful for the right-side result cards, because it gives the disorder and birth-defect section a clearer input than a generic related / unrelated toggle.
4

Abilities and disorders are not side notes

A lot of breeding calculators over-focus on visible traits and under-explain the side systems that actually influence roster quality. This page gives those systems their own summary blocks:

  • Ability inheritance summarizes active and passive carry.
  • Disorder & birth-defect risk keeps downside visible.
  • Room readout shows whether your room setup is quietly dragging consistency down.
5

Trait planning is optional, not the engine

The optional Mendelian trait planner is there for players who want to explicitly plan a single trait line with genotypes like AA, Aa, and aa.

It is intentionally separated from the main stat engine so the page does not pretend that every trait question can be solved by a free-text inheritance guess.

Read the output

How to read the simulator output

The fastest way to use the page is to read the output in this order:

  1. Base-stat inheritance forecast — is the pairing actually pressuring the line upward?
  2. Ability inheritance — is there enough upside in actives or passives to justify the pairing?
  3. Disorder & birth-defect risk — is the risk still acceptable once IC is accounted for?
  4. Room readout — is the environment helping or quietly sabotaging you?
  5. Mendelian trait planner — only after the main pairing makes sense.
Best use cases

When this breeding calculator is most valuable

  • When two pairings look similar on paper and you need a cleaner tie-breaker.
  • When you are deciding whether higher IC is worth the stat pressure.
  • When you want to know whether a room needs upgrades before you push a generation.
  • When you are trying to preserve a useful passive or active while still improving base stats.
  • When you want a shareable planning state instead of re-explaining a pairing manually.

Breeding strategy notes

  • Do not overvalue one flashy stat. A cleaner pair with fewer weak spots often scales better over several generations.
  • Use Stimulation intentionally. Low Stimulation makes pairings flatter; strong rooms are where better parents separate themselves.
  • Do not ignore Comfort. Even a strong pair can feel worse in practice if the breeding room is unstable.
  • Treat IC like pressure, not a binary. A little risk is not the same as a collapsing line.

Close the loop with other tools

After you choose a pairing, use the Luck & Probability Calculator to sanity-check odds, then open the Mutation Database if you are checking downstream trait or mutation implications. After choosing a pairing, use the Luck Calculator to sanity-check odds and the Mutation Database to review downstream trait implications.

Breeding simulator FAQ

These are the questions players usually have when they are deciding whether a pairing is worth the time, room setup, and long-term risk.

Is this Mewgenics breeding simulator exact?

This page is best treated as a stat-first breeding planner. It is designed to help you compare pairings, estimate likely outcomes, and spot room or risk problems before committing a generation. Where public mechanics are clear, the tool models them directly. Where they are incomplete, the page stays conservative and explains the forecast as planning support rather than a guaranteed result.

What does Stimulation change in breeding?

Stimulation is used here as the main quality lever. In practical terms, higher Stimulation improves the chance that a kitten inherits the better parent value on unequal base stats, and it also improves the odds of inheriting active and passive abilities. If you are chasing stronger offspring, Stimulation matters more than raw room comfort.

What does Comfort change in breeding?

Comfort is used as the room-stability check. Overcrowding and poop reduce Comfort, and negative Comfort is a warning sign that the room is not well suited to consistent breeding. This page separates Comfort from Stimulation on purpose: one is about room stability, the other is about quality pressure.

Why use an inbreeding coefficient instead of relationship labels?

A continuous inbreeding coefficient is more flexible than broad labels like siblings or cousins. It lets you model risk as a gradient instead of forcing every pairing into a few buckets. That makes the risk output more useful when you are managing multiple branches of a long breeding line.

What is the Mendelian trait planner for?

The Mendelian trait planner is an optional layer for explicit trait planning. Instead of guessing from free-text trait tags, it asks you to enter clear genotypes like AA, Aa, or aa. This keeps trait planning separate from the main stat engine and makes the output easier to interpret.

Who is this page for?

This page is useful for players who want a practical Mewgenics breeding calculator, a stat inheritance planner, a house comfort checker, or a cleaner way to compare pairings before they spend time on a generation.

Why players use this simulator

Compare pairings faster

When two pairings look close, this page helps you see which one actually applies better stat pressure, carries more useful ability upside, and introduces less long-term risk.

Catch room problems early

Breeding lines do not fail only because of bad pairings. Weak Stimulation, negative Comfort, overcrowding, and poop pressure can all make a room underperform. This page keeps those problems visible.

Balance growth against risk

It is easy to chase one strong outcome and ignore the cost. This planner helps you weigh better stats and trait goals against IC pressure, disorder risk, and long-term line stability.