
Modrinth · Minecraft mod
CobblemonOptimizer
CobbleOptimizer is a server-side Fabric mod that reduces lag caused by Cobblemon's Pokemon entities.
Quick answer
Which CobblemonOptimizer release should I use?
CobblemonOptimizer 4.6.0 targets 1.21.1 with NeoForge. Do not install it on the client. It must be installed on the dedicated server. No extra mods listed for this file.
Where it goes
Is CobblemonOptimizer required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does CobblemonOptimizer 4.6.0 need?
4.6.0. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add CobblemonOptimizer without breaking your instance.
Built for CobblemonOptimizer 4.6.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 4.6.0. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 4.6.0. It opens that exact file at the source.
About this project
What does CobblemonOptimizer add?
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:
- 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. - 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. - 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. - 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.
Project description from Modrinth.
Pick your setup
CobblemonOptimizer by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.1
1 loader build26.1
1 loader build1.21.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
CobblemonOptimizer versions and loaders
4.6.0
CobbleOptimizer-4.6.0.jar
24 May 2026
4.6.0
CobbleOptimizer-4.6.0.jar
24 May 2026
4.4.0
CobbleOptimizer-4.4.0.jar
12 May 2026
4.4.0
CobbleOptimizer-4.4.0.jar
12 May 2026
4.3.3
CobbleOptimizer-4.3.3.jar
5 May 2026
4.3.3
CobbleOptimizer-4.3.3.jar
5 May 2026
4.3.2
CobbleOptimizer-4.3.2.jar
2 May 2026
4.3.2
CobbleOptimizer-4.3.2.jar
2 May 2026
4.3.0
CobbleOptimizer-4.3.0.jar
9 Apr 2026
4.3.0
CobbleOptimizer-4.3.0.jar
9 Apr 2026
4.2.0
CobbleOptimizer-4.2.0.jar
31 Mar 2026
4.2.0
CobbleOptimizer-4.2.0.jar
31 Mar 2026
Looking for an older file? The official Modrinth project page is in Resources.