RCT Custom Series: Failrun
a challenging cobblemon series with trainers, custom trials, and gym battles.
Screenshots
About this Mod
Failrun is a progression-focused trainer series addon for the Radical Trainers mod.
The series includes over 80 custom trainers, with approximately 40 required to complete the main progression. Progression follows an 8-gym structure, followed by an Elite Four and Champion battle, alongside Z-Crystal trials and an original antagonist team used for progression.
Defeating required trainers increases the level cap incrementally, typically by 2–3 levels per milestone.
Optional custom trials are included and reward Z-Crystals such as Mimikyunium Z and various TMs.
Battles include single, double, and triple formats, with additional optional trainers available in the post-game.
Guide Below:
https://docs.google.com/spreadsheets/d/13MzvttoU4mQEFHZVo09C7E-4seZ9jUK40gHE3P14TqU/edit?usp=sharing
Available Versions
How to Install RCT Custom Series: Failrun on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "RCT Custom Series: Failrun". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
RCT Custom Series: Failrun 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 Custom Series: Failrun compatible with datapack and fabric and forge and neoforge and quilt?
RCT Custom Series: Failrun 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 Custom Series: Failrun – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if RCT Custom Series: Failrun 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 Custom Series: Failrun with just one click on your server.