Vivillon Overhaul (Cobblemon)

Vivillon Overhaul (Cobblemon)

Overhauls Vivillon and its pre-evolutions to fix the many issues regarding them (Cobblemon).

by
3.2K Downloads
datapackfabricforgeminecraftneoforgequiltadventuregame-mechanics
Rent Server with this Mod

Screenshots

Sleeping soundfully knowing its bugs have been fixed
No longer limited to mushroom biomes!
Spawning at new heights
Remembers where its caught!
Proper Pokédex Patterns
Follow the leader!

About this Mod

Vivillon Overhaul

Massively reworks Vivillon and its pre-evolutions to properly reflect the games with how they evolve, aswell as fixing many key issues like getting multiple different Vivillon patterns in one biome, not being able to read Vivillons unique dex entries, Scatterbug not being able to spawn in forest biomes with tall trees, and more! Comprehensive list of changes are located in the changelog.

Vivillon and its pre-evolutions in a jungle, in places they couldn't spawn before!

Compatibility

Currently only has explicit support for Terralith, WWEE, BOP, BWG, Nature's Spirit, and more (full list in changelog), aswell as vanilla biomes, Vivillon and its pre-evolutions will only spawn in biomes with explicit support.

Vivillon and its pre-evolutions in a modded biome

Can I install this on my current world?

Yes, but your current Scatterbugs and Spewpas will only be able to evolve into the Meadow pattern Vivillon.

Herd of Ocean pattern Vivillon

Available Versions

V1.3 (Mod Version)release
MC 1.21.1fabric, forge, neoforge, quilt
January 19, 2026
V1.3 (Datapack Version)release
MC 1.21.1datapack, minecraft
January 19, 2026
V1.2-Modded (Mod Version)release
MC 1.21.1fabric, forge, neoforge, quilt
January 12, 2026
V1.2-Vanilla (Mod Version)release
MC 1.21.1fabric, forge, neoforge, quilt
January 12, 2026
V1.2-Modded (Datapack Version)release
MC 1.21.1datapack, minecraft
January 12, 2026

How to Install Vivillon Overhaul (Cobblemon) 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 "Vivillon Overhaul (Cobblemon)". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeminecraftneoforgequilt

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Vivillon Overhaul (Cobblemon) 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 Vivillon Overhaul (Cobblemon) compatible with datapack and fabric and forge and minecraft and neoforge and quilt?

Vivillon Overhaul (Cobblemon) officially supports datapack, fabric, forge, minecraft, 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 Vivillon Overhaul (Cobblemon) – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Vivillon Overhaul (Cobblemon) 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 Vivillon Overhaul (Cobblemon) with just one click on your server.

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

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.21.1