Cobblemon Shiny Days
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
I don't know my version or loader

Choose days of the week to increase shiny odds for either all Pokémon or specific Pokémon, giving your server events similar to Community Days in Pokémon GO.
Dependencies
Cobblemon - Modrinth / Curseforge
Fabric Language Kotlin (for Fabric servers) - Modrinth / Curseforge
Features
- Choose which days to increase shiny rates
- Increase shiny odds for all spawns or only specific Pokémon
- Broadcasts a message at a customisable interval to remind players what shiny rates are currently increased
- /shinyday command to check currently boosted shiny rates
Installation
Place the .jar file in your /mods folder, and restart the server.
Configuration
The configuration has 5 customisable options
- "species" : which Pokémon will have increased rates (can use "ALL" to increase odds of all Pokémon)
- "labels" : Pokémon with these labels will have their shiny rates increased ("legendary", "gen1", "gen2" etc.)
- "types" : Pokémon with these types will have their shiny rates increased ("water", "fire" etc.)
- "days" : which days to apply the specified rates to the specified Pokémon
- "multiplier" : how much to multiply odds by (uses the shiny rates in your Cobblemon config as a base rate, then adds this modifier) e.g. Cobblemon shiny rate is 1/8192, a multiplier of 2.0 will make the rate 1/4096
- "broadcastInterval" : how often to send the broadcast (in seconds) letting players know which Pokémon have increased shiny rates.
Example Config
[
{
"species": ["Pikachu", "Bulbasaur", "Charmander", "Squirtle"],
"labels": ["legendary", "mythical"],
"types": ["normal"],
"days": ["Saturday", "Sunday"],
"multiplier": 5.0,
"broadcastInterval": 300
},
{
"species": [],
"labels": ["gen1"],
"types": ["water"],
"days": ["Monday"],
"multiplier": 2.0,
"broadcastInterval": 300
},
{
"species": [],
"labels": ["gen2"],
"types": ["fire"],
"days": ["Tuesday"],
"multiplier": 2.0,
"broadcastInterval": 300
},
{
"species": [],
"labels": ["gen3"],
"types": ["grass"],
"days": ["Wednesday"],
"multiplier": 2.0,
"broadcastInterval": 300
},
{
"species": [],
"labels": ["gen4"],
"types": ["psychic"],
"days": ["Thursday"],
"multiplier": 2.0,
"broadcastInterval": 300
},
{
"species": [],
"labels": ["gen5"],
"types": ["steel"],
"days": ["Friday"],
"multiplier": 2.0,
"broadcastInterval": 300
}
]
The config above would work as follows
Saturday and Sunday - Pikachu, Bulbasaur, Charmander, Squirtle, Normal-type, legendary and mythical Pokemon have 5x shiny rates
Monday - All Gen 1 & Water-type Pokemon have 2x shiny rates
Tuesday - All Gen 2 & Fire-type Pokemon have 2x shiny rates
Wednesday - All Gen 3 & Grass-type Pokemon have 2x shiny rates
Thursday - All Gen 4 & Psychic-type Pokemon have 2x shiny rates
Friday - All Gen 5 & Steel-type Pokemon have 2x shiny rates
Authors
Created by Shadymitsu and ChatGPT
License
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as CobblemonShinyDays-1.1.1-neoforge.jar — drop this file into the mods folder
- Download size: 44 KB
- Download link checked 28 Sept 2026 — working
These come from our own check of the pack file, not from the source page.