Cobblemon Shiny Days
by Shadymitsu
On chosen weekdays, a server owner can raise the shiny odds for selected Pokémon, in a way that resembles Community Days in Pokémon GO.
What it does
On the days the server owner picks, the mod raises shiny odds either for specific Pokémon named in the config or for groups of Pokémon. Groups can be chosen by label, such as legendary or generation, or by type, such as water or fire. Rates are set per group, and the mod applies them only to the Pokémon it lists.
A broadcast message can be sent at a customisable interval to remind players that shiny rates are increased for the day. The configuration has five customisable options, and the settings above work together.
The mod runs on the server alone, so players join without installing it. It requires Cobblemon and Fabric Language Kotlin, and files exist for Fabric and NeoForge for 1.21.1. The code is open source under the MIT License.
Key features
Weekday shiny events
Shiny rates change only on days the server owner selects, such as Saturday and Sunday.
Per-group rate multipliers
Pikachu, Bulbasaur, Charmander and Squirtle, plus Normal-type, legendary and mythical Pokémon, get a 5x rate; Gen 1 to Gen 5 groups tied to a type get 2x.
Customisable reminders
Broadcast messages can be sent at a chosen interval to tell players which rates are raised.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Community event nights
A server can run recurring shiny weekends that focus on a set of Pokémon, giving players a reason to log in on those days.
Who it’s for: Server owners who run Cobblemon and want scheduled shiny boosts without changing the spawn tables themselves.
How it compares
Cobblemon Unique Legends is server-side only, open source under the MIT License and published for 1.21.1 on Fabric and NeoForge, so it covers a different feature area. Pokemon Fair Catch is client and server, open source under the MIT License and also published for 1.21.1, so both sides need it. Cobblemon Randomizer is client and server and released under All rights reserved for 1.21.1, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Cobblemon Shiny Days | Fabric and NeoForge | 1.21.1 | Server-side only | 2026-06-04 |
| Cobblemon Unique Legends | Fabric and NeoForge | 1.21.1 | Server-side only | 2026-07-13 |
| Pokemon Fair Catch | Fabric and NeoForge | 1.21.1 | Client and server | 2025-12-04 |
| Cobblemon Randomizer | Fabric and NeoForge | 1.21.1 | Client and server | 2026-04-26 |
Questions
Does Cobblemon Shiny Days need Cobblemon installed?
Does a player need to install Cobblemon Shiny Days?
Which loaders are supported?
In the catalog
Cobblemon Shiny Days is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
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. Place the.jar file in your /mods folder, and restart the server.
Official listing
- Modrinth page
- modrinth.com/mod/cobblemon-shiny-days
- Owner
- Shadymitsu
- Published
- 2025-04-12
- Updated on Modrinth
- 2026-06-04
- Facts verified
- 2026-10-15