CobbleBoss
by RainApricot
CobbleBoss lets server owners define custom Boss battles for the Cobblemon world, each with its own Pokemon, display name, glow color and spawn rules.
What it does
Each Boss is described by a data pack file under the cobbleboss namespace, with a unique internal ID, a player-facing name and a species assignment. A Boss can glow in a chosen outline color after it spawns, and its natural spawn conditions can be limited by time of day, biome, structure and spawn weight. Rewards and punishments are set per Boss, including items, commands and Pokemon level reduction after a loss.
The mod also controls battle setup: the battle mode and layout, the number of actions per turn, held items, stat overrides and shininess. A shield system, enabled in a global switch, gives a Boss extra protection through initial shield layers, per-turn recovery and a weakened period after the shield breaks. Phases can change moves based on HP percentage. Configuration covers both the normal Boss folder and paid multiplayer Boss team files, and Fabric and NeoForge share the same field names and TOML structure.
Cobblemon is required, because the Bosses are built around its species and battles. CobbleBoss runs on client and server, so both the server and every player need it, and it is published for Fabric and NeoForge for 1.21.1.
Key features
Custom Boss definitions
Each Boss is a separate file with its own ID, name, species and glow color, so new Bosses can be added without changing code.
Natural spawn rules
Spawn conditions can restrict a Boss to specific times, biomes, structures and spawn selection weights.
Rewards and punishments
Direct reward entries, reward pools and punishment entries can run commands, grant items or reduce the Pokemon level after a defeat.
Battle shield system
Initial shield layers, per-turn recovery and a weakened period after a break give Bosses extra protection during battle.
Phase-based moves
Boss moves change at configured HP percentages, so a fight can shift as its health drops.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Server events
Server owners can place unique Bosses in the world as a recurring challenge for players.
Multiplayer teams
Paid multiplayer Boss team files let a server define larger group encounters.
Who it’s for: Server owners and pack makers who want to design their own Boss battles for Cobblemon without writing Java code.
How it compares
Cobbled Level Control is server-side only, open source under the MIT License and published for 1.21.1, so players need nothing installed. Cobblemon Raid Dens is client and server, open source under the MIT License and also for 1.21.1, and it adds raid battles rather than configurable Bosses.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| CobbleBoss | Fabric and NeoForge | 1.21.1 | Client and server | 2026-05-24 |
| Cobbled Level Control | Fabric and NeoForge | 1.21.1 | Server-side only | 2026-09-06 |
| Cobblemon Raid Dens | Fabric and NeoForge | 1.21.1 | Client and server | 2026-10-08 |
Questions
Does CobbleBoss need Cobblemon?
Which loaders does CobbleBoss support?
Does CobbleBoss have to be installed on both sides?
In the catalog
CobbleBoss is one of 19,031 Adventure mods on ModsFinder, and one of 10,052 Adventure mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from RainApricot
Similar mods
What the author says
CobbleBoss data packs use the cobbleboss namespace. Defines which Pokemon species the Boss is.
Official listing
- Modrinth page
- modrinth.com/mod/cobbleboss
- Owner
- RainApricot
- Published
- 2025-11-12
- Updated on Modrinth
- 2026-05-24
- Facts verified
- 2026-10-15