Mob Lister
by Amgelo563
Mob Lister is a Fabric mod for the 1.20.1 game version that lists the mob types registered in a world and reports which ones appear more than once.
What it does
A Fabric mod for Minecraft 1.20.1 that reads the mob types registered in the game and prints them in a chat list. Modpack makers use it to see which mobs were added by each installed mod. A second command lists only the mob types that were registered more than once, which points to possible duplicates between mods. Fabric API is required, and the mod is not needed on servers because it only runs on the client.
The author built it for large modpacks, where checking the game logs by hand to find duplicate mob entries is slow and the output can be too long to read. The commands print the results straight into chat instead. The author notes that a very large modpack may still produce a long list in chat, and that the log can be checked for the same information when the output does not fit on screen.
The mod is published for Fabric only, with a single build for 1.20.1 released on 2025-12-28. Its source code and issue tracker are public, and the code is open source under the MIT License.
Key features
Mob list command
The list command prints every registered mob type in chat, so the full set of mobs in the game is visible at once.
Duplicates command
The duplicates command prints only the mob types that were registered more than once, which narrows the search to possible conflicts.
Chat output
Results are written to the chat window, so no log file has to be opened to read them, though very long lists may be hard to scroll through.
Single purpose
The mod does one job, reporting mob registrations, and adds no items, blocks or gameplay changes to the world.
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 1
Use cases
Checking a modpack for mob conflicts
A modpack maker runs the duplicates command after adding a new mod to see whether it registers mobs that already exist.
Who it’s for: Modpack makers and pack testers who want to know which mobs their installed mods registered, and which of them overlap.
How it compares
Command Remover is a client-side only Fabric mod for 1.21.11 under the MIT License, so it covers a different version and task. Effect black list runs on Fabric, Forge and NeoForge for 1.20.1, and installing it on one side is enough, so it can be added to a client or a server. It is open source under the MIT License. Mob Lister is the Fabric 1.20.1 mod here, and it runs on the client alone.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mob Lister | Fabric | 1.20.1 | Client-side only | 2025-12-28 |
| Command Remover | Fabric | 1.21.11 | Client-side only | 2026-05-05 |
| Effect black list | Fabric, Forge and NeoForge | 1.20.1 | Client or server, optional | 2025-04-21 |
Questions
Does Mob Lister need Fabric API?
Does the server need Mob Lister installed?
Can Mob Lister be used with other loaders?
In the catalog
Mob Lister is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
A simple Fabric 1.20.1 mod to list all registered mob types and possible duplicates. While making a modpack, you might want to know what mobs you ended up with, and if there might be any duplicates. This mod was specifically made for that.
Official listing
- Modrinth page
- modrinth.com/mod/mob-lister
- Owner
- Amgelo563
- Published
- 2025-12-28
- Updated on Modrinth
- 2025-12-28
- Facts verified
- 2026-10-15