RCT Addon - Toppoh League Radical Cobblemon Trainers

An addon for the radical trainers mod that adds the Gym Leaders of the Toppoh Region.

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4.2K Downloads
datapackfabricforgeneoforgequiltadventuregame-mechanicsminigame
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Screenshots

Fight against custom Trainers!

About this Mod

This addon adds a new fictive Gym Series for the Radical Cobblemon Trainers mod.
Some features require Mega Showdown to be installed as well.
The Datapack was made for the Modpack "Toppermon" but can also be used without it.
Several playtests were held to make sure that all gym leaders feel challenging without making them too unfair. All fights are meant to need preparation and team planning but are overcomeable.

I made this for the group of friends that I play with.
The Addon includes 8 Gym Leaders, 4 Members of the Elite 4, a Champion and multiple Trainer fights in between.

Some of the Pokémon Trainers you will face are:
Normal, Electric, Fire, Fighting, Poison, Fairy, Ice and Dark Type Gym Leaders.
A Special type of Dancing themed Member of the elite 4
and several more trainers with diverse teams!

If you are looking for a difficult yet fair Gym Series that is not from any mainline Pokémon game, this might be the one for you.
I RECOMMEND USING THE MOD VERSION OF THIS ADDON

Starting the Gym Series is the same as with any other RCT Series: You obtain a Trainer Card that you can exchange for the "Toppoh Series" one at the Gym Association Villager.

Available Versions

Hotfixrelease
MC 1.21.1fabric, forge, neoforge, quilt
December 24, 2025
Hotfixrelease
MC 1.21.1datapack
December 24, 2025
1.2release
MC 1.21.1fabric, forge, neoforge, quilt
December 15, 2025
1.2release
MC 1.21.1datapack
December 15, 2025
1.1release
MC 1.21.1fabric, forge, neoforge, quilt
December 14, 2025

How to Install RCT Addon - Toppoh League Radical Cobblemon Trainers on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "RCT Addon - Toppoh League Radical Cobblemon Trainers". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

RCT Addon - Toppoh League Radical Cobblemon Trainers server crashes on startup – what to do?

Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is RCT Addon - Toppoh League Radical Cobblemon Trainers compatible with datapack and fabric and forge and neoforge and quilt?

RCT Addon - Toppoh League Radical Cobblemon Trainers officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with RCT Addon - Toppoh League Radical Cobblemon Trainers – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if RCT Addon - Toppoh League Radical Cobblemon Trainers consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install RCT Addon - Toppoh League Radical Cobblemon Trainers with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.1