CurseForge · Minecraft mod
Asymmetric Battles API
Expand the capabilities of Cobblemon's battle engine!
Quick answer
Which Asymmetric Battles API release should I use?
Asymmetric Battles API asymmetricbattles-fabric-1.4.2+1.21.1.jar targets 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is Asymmetric Battles API required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Asymmetric Battles API asymmetricbattles-fabric-1.4.2+1.21.1.jar need?
asymmetricbattles-fabric-1.4.2+1.21.1.jar. Change the file and its required mods may change too.
Install Cobblemon, Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Asymmetric Battles API without breaking your instance.
Built for Asymmetric Battles API asymmetricbattles-fabric-1.4.2+1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use asymmetricbattles-fabric-1.4.2+1.21.1.jar. It targets 1.21.1 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cobblemon, Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside asymmetricbattles-fabric-1.4.2+1.21.1.jar. It opens that exact file at the source.
About this project
What does Asymmetric Battles API add?
Asymmetric Battles API
Expand the capabilities of Cobblemon's battle engine!
Asymmetric Battles API lifts core restrictions around Cobblemon's and Showdown's battle engine allowing for some truly wild battles.

- Adds Quadruple (4v4), Pentuple (5v5), Sextuple (6v6) and Horde (1v6) battles.
- Allows starting Double and Triple battles (and the new formats) with fewer than the required number of Pokémon.
- Allows Multi Battles to start with only one actor on either side.
- Allows actors to join Multi Battles after they have already started.
Compatibilities
Asymmetric Battles API heavily modifies the showdown files and may cause incompatibility issues with mods that do similar things, but includes built-in compatibility with a few popular mods.
- Mega Showdown
- Genesis Forms
Project description from CurseForge.
Pick your setup
Asymmetric Battles API by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Asymmetric Battles API versions and loaders
asymmetricbattles-fabric-1.4.2+1.21.1.jar
asymmetricbattles-fabric-1.4.2-1.21.1.jar
9 Nov 2026
asymmetricbattles-neoforge-1.4.2+1.21.1.jar
asymmetricbattles-neoforge-1.4.2-1.21.1.jar
9 Nov 2026
asymmetricbattles-neoforge-1.4.1+1.21.1.jar
asymmetricbattles-neoforge-1.4.1-1.21.1.jar
8 Nov 2026
asymmetricbattles-fabric-1.4.1+1.21.1.jar
asymmetricbattles-fabric-1.4.1-1.21.1.jar
8 Nov 2026
asymmetricbattles-neoforge-1.4.0+1.21.1.jar
asymmetricbattles-neoforge-1.4.0-1.21.1.jar
8 Nov 2026
asymmetricbattles-fabric-1.4.0+1.21.1.jar
asymmetricbattles-fabric-1.4.0-1.21.1.jar
8 Nov 2026
asymmetricbattles-neoforge-1.3.1+1.21.1.jar
21 Oct 2026
asymmetricbattles-fabric-1.3.1+1.21.1.jar
21 Oct 2026
asymmetricbattles-neoforge-1.3.0+1.21.1.jar
19 Oct 2026
asymmetricbattles-fabric-1.3.0+1.21.1.jar
19 Oct 2026
asymmetricbattles-neoforge-1.2.3+1.21.1.jar
14 Oct 2026
asymmetricbattles-fabric-1.2.3+1.21.1.jar
14 Oct 2026
Looking for an older file? The official CurseForge project page is in Resources.