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Cobblemon: Catch Ball Rules

Cobblemon Catch Ball Rules is a Fabric mod for Minecraft 1.21.1 that lets server owners decide which Pokemon species can only be caught with specific Poke Balls.
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Description

# Cobblemon Catch Ball Rules

Cobblemon Catch Ball Rules is a Fabric mod for Minecraft 1.21.1 that lets server owners decide which Pokemon species can only be caught with specific Poke Balls.

If a species is restricted and the player throws the wrong ball, the capture fails immediately.
If the ball is allowed, Cobblemon handles the rest with its normal catch logic.

## Features

- Restrict specific Pokemon to specific Poke Balls
- Keep rules in a simple JSON config file
- Support Cobblemon balls and custom balls from add-ons or modpacks
- Preserve Cobblemon's normal capture formulas for valid balls
- Reload the config with a command instead of restarting the server
- Optionally refund blocked balls
- Optionally show a custom player message when a catch is blocked

## Requirements

- Minecraft `1.21.1`
- Fabric Loader
- Cobblemon `>=1.7.3 <1.8.0`

## Server And Client Support

- Gameplay enforcement is server-side
- The mod can also be installed on the client and loads cleanly there
- In practice, this is mainly a server-side rules mod

## Installation

1. Install Fabric Loader for Minecraft `1.21.1`
2. Install Cobblemon for the same Minecraft version
3. Put this mod in your `mods` folder
4. Start the game or server once to generate the config file

## Config File

Path:

config/cobblemon_catch_ball_rules.json
 

Example:
{ "consumeBlockedBall": false, "showPlayerMessage": true, "rules": [ { "pokemon": ["mew", "mewtwo", "lugia"], "allowedBalls": ["cobblemon:master_ball"], "message": "&6&lLegendary rule! &r&7This Pokemon can only be captured with a &6Master Ball&7." } ] }
 
## Config Options

- `consumeBlockedBall`
When `false`, the mod refunds the blocked ball. When `true`, the blocked ball is still consumed.
- `showPlayerMessage`
When `true`, the player sees the rule message after a blocked catch. When `false`, the catch is blocked silently.
- `rules`
A list of species-specific catch restrictions.

Each rule contains:

- `pokemon`: a list of species names or species IDs
- `allowedBalls`: a list of allowed Poke Ball item IDs
- `message`: the message shown when a catch is blocked

## Writing Rules

Pokemon values can use either short names or full IDs:

- `"mew"`
- `"cobblemon:mew"`

Ball values should use full item IDs:

- `"cobblemon:poke_ball"`
- `"cobblemon:ultra_ball"`
- `"cobblemon:master_ball"`

Custom balls from other mods or add-ons also work as long as you use the correct item ID.

The `message` field supports Minecraft legacy formatting codes with either `&` codes or section-sign codes.

## Example Rules

Legendary Pokemon that only allow Master Balls:

{
  "pokemon": ["mewtwo"],
  "allowedBalls": ["cobblemon:master_ball"],
  "message": "&4&lBlocked! &r&7This Pokemon can only be captured with a &6Master Ball&7."
}

Ultra Beasts that only allow Beast Balls:

{
  "pokemon": ["nihilego", "buzzwole", "pheromosa"],
  "allowedBalls": ["cobblemon:beast_ball"],
  "message": "This Pokemon reacts only to a Beast Ball."
}

Pokemon that allow more than one ball:

{
  "pokemon": ["articuno"],
  "allowedBalls": ["cobblemon:ultra_ball", "cobblemon:master_ball"],
  "message": "Articuno can only be captured with an Ultra Ball or Master Ball."
}

## Commands

Reload the config without restarting:
/ccbr reload
/cobblemoncatchballrules reload

This command requires operator permission.

## Troubleshooting

- If the config file is missing, the mod creates a default one automatically
- If the config file is invalid JSON, the mod regenerates it with defaults and logs the error
- If a rule seems ignored, check the species ID, ball ID, and whether the species matches one of your configured rules

The Cobblemon: Catch Ball Rules Team

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We build custom Minecraft mods, tools, and creative projects designed to bring more personality and depth to every experience.

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