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CobblemonOptimizer

CobbleOptimizer is a server-side Fabric mod that reduces lag caused by Cobblemon's Pokemon entities.

FabricNeoForge
Loaders
FabricNeoForge
Downloads on Modrinth
29.4K
Followers on Modrinth
34
versions
39
Updated
September 10, 2026Sep 10
Published
in 2026

At a glance

Runs on Fabric and NeoForge
For Minecraft 1.21.1
Server only — players don't need to install it
Latest version — 5.0.0 from September 10, 2026
License MIT — free
Where it's needed
In gamenot neededOn serverrequired

Install on the server only; players don't need it

Game versions1.21.1

CobbleOptimizer

A server-side Fabric mod for Minecraft 1.21.1 that optimizes Cobblemon (the Pokemon mod) entity performance based on server load (TPS). It has 4 main
features:

  1. Tick Throttle — Reduces how often distant/unimportant Pokemon entities are ticked. When the server TPS drops, Pokemon far from players get their tick rate reduced, saving CPU cycles.
  2. AI Freeze — Completely freezes the AI of Pokemon entities that are far from any player. If no one is nearby to observe them, there's no need to run their pathfinding and behavior logic.
  3. Adaptive Spawn — Dynamically adjusts Pokemon spawn rates based on current server TPS. When the server is struggling, fewer Pokemon spawn; when it's healthy, spawns return to normal.
  4. Batch Despawn — Removes excess Pokemon entities in bulk when the server is overloaded, prioritizing removal of unimportant ones (non-shiny, non-legendary, unowned, not in battle).

    Shared Infrastructure

    • TPS Monitor — Continuously tracks server TPS to inform all features.
    • Player Tracker — Caches player-to-entity distances so multiple features can cheaply check proximity.
    • Config — TOML-based configuration with in-game commands (/cobbleoptimizer) to tweak thresholds on the fly.

    In short

    It's a performance optimization mod that keeps Cobblemon servers running smoothly by intelligently scaling back Pokemon entity processing when the server is under load, while protecting important Pokemon (shinies, legendaries, battling, owned) from aggressive optimization.

FAQ

How to install CobblemonOptimizer?

Install Fabric for your Minecraft version, download CobblemonOptimizer for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does CobblemonOptimizer support?

CobblemonOptimizer has builds for Minecraft 1.21.1.

Is CobblemonOptimizer needed on the server?

Server only — players don't need to install it

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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