BlockBoy

Gameboy Emulator for Minecraft. Works Serverside only

3.7K Downloads

fabricminigameutility

Rent Server with this Mod

Screenshots

About this Mod

BlockBoy

Gameboy (Color) emulator for fabric servers.
Works serverside as well as in single player.

Optionally supports the simple voice chat mod for audio.

Put Gameboy (.gb) or Gameboy Color (.gbc) roms in a folder called roms in your server's root directory - this can be configured in configs/blockboy.json.

Save files will be placed in the roms/ folder - this can also be configured.

Commands:

/blockboy <rom name>

To leave the current game:
/exit

The screen can be scaled using /scale 1-5

Permissions for Luckperms and friends: blockboy.command, with vanilla permission level 1

Controls:

WASD = D-PAD
Jump = A
Sneak = B
Left Click = Start
Right Click = Select

Available Versions

BlockBoy 0.9.0+1.21.5release

MC 1.21.5fabric

April 24, 2025

BlockBoy 0.9.0+1.21.4-1.21.5release

MC 1.21.4fabric

December 27, 2024

BlockBoy 0.9.0+1.21release

MC 1.21, 1.21.1fabric

December 27, 2024

BlockBoy 0.8.1+1.21.2-rc1release

MC 1.21.2-rc1, 1.21.2-rc2, 1.21.2, 1.21.3fabric

October 22, 2024

BlockBoy 0.8.1+1.20.1release

MC 1.20.1fabric

October 9, 2024

How to Install BlockBoy on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.5).

Install Mod

Open the mod browser in the dashboard and search for "BlockBoy". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.5, 1.21.4, 1.21.3 (+8 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

BlockBoy server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.5). You can switch loaders with one click in the panel.

Is BlockBoy compatible with fabric?

BlockBoy officially supports fabric for Minecraft 1.21.5, 1.21.4, 1.21.3. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with BlockBoy – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if BlockBoy consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.