To run Pixelmon with Minecraft 1.7.10, install the recommended Forge 1.7.10 server, use 64-bit Java 8, allocate at least 3 GB of memory, and add the unchanged Pixelmon 3.5.1 server jar to the server’s mods folder. Every connecting player must use Pixelmon 3.5.1 on Minecraft: Java Edition or the connection will be rejected.
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The procedure below covers a Windows, macOS, or Linux installation, first launch and EULA acceptance, client setup, local-network play, remote access, configuration, sidemods, and the most common startup and connection failures.
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Pixelmon’s compatibility table maps Minecraft 1.7.10 to Pixelmon 3.5.1. Treat that pairing as fixed: installing a different Pixelmon release on either the server or a client produces an incompatible setup.
| Component | Required value | Why it matters |
|---|---|---|
| Minecraft edition | Java Edition | The official Minecraft server setup is compatible with Java Edition, not the Bedrock edition. |
| Minecraft version | 1.7.10 | This is the game version used by the Pixelmon release covered here. |
| Pixelmon version | 3.5.1 | Pixelmon Mod Wiki’s 2023 compatibility table pairs this release with Minecraft 1.7.10. |
| Java runtime | 64-bit Java 8 | The Pixelmon server guide states that earlier and later Java versions will not work for this setup. |
| Allocated memory | At least 3 GB | The guide’s minimum is “at least 3 GB of allocated memory, preferably more.” The suitable amount rises with player count and additional mods or plugins. |
Check Java before installing
Install a 64-bit Java 8 runtime on the machine that will run the server. On Windows, open Command Prompt; on macOS or Linux, open Terminal and run:
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java -versionConfirm that the reported major version is 8 and that the runtime is 64-bit. If the command is not found, install Java 8 and reopen the terminal. If another Java installation is selected first in the system path, adjust the path or call the Java 8 executable directly when starting the server. Do not assume that a newer Java release is interchangeable for this legacy Forge and Pixelmon combination.
Choose hardware realistically
Three gigabytes is an allocation floor, not a guarantee of smooth play. The server also needs memory for the operating system, Java itself, world generation, and any sidemods. Leave usable memory for the host computer rather than assigning all installed RAM to Minecraft. Increase -Xms and -Xmx only when the machine has headroom and the player count or mod set justifies it.
Decide where the server will run
A computer in your home is suitable for a small group on the same network. It gives you direct access to the files and avoids a hosting subscription, but the computer must remain powered on and your network must accept game traffic. A managed Minecraft host is a better fit when you need a public server, predictable uptime, more CPU or memory headroom, or help with networking.
| Consideration | Self-hosted computer | Managed hosting |
|---|---|---|
| Initial setup | You install Java, Forge, Pixelmon, and configure the operating system. | The host usually supplies a panel and a preconfigured server environment; Pixelmon compatibility still has to be selected correctly. |
| Players outside your home | Usually requires router port forwarding, a firewall rule, and a reachable address. | Remote access is normally provided by the host, so home-router configuration is reduced. |
| CPU and memory | Limited by the computer’s available resources and other workloads. | Depends on the plan; choose enough memory for the player count and sidemods. |
| Uptime | Depends on power, internet service, maintenance, and whether the computer stays on. | Depends on the provider’s infrastructure and plan. |
| Cost | No hosting price is specified; you supply the computer, power, and connection. | A recurring hosting charge applies, but no amount is established here. |
| Support | You troubleshoot Java, Forge, networking, and files yourself. | Support availability varies by host and plan. |
Start locally if you are learning or playing with people on the same network. Move to managed hosting when keeping a home machine online, opening a router port, or handling a growing player base is impractical.
Install the Forge 1.7.10 server
Use a dedicated folder that contains only this server. A path such as Pixelmon-1.7.10-Server keeps the installation, world, logs, configuration, and mods together.
- Obtain the recommended Forge build for Minecraft 1.7.10. Run the Forge installer, select Install server, and choose the dedicated server folder. Some Windows installations need the Installer-win file from Forge’s Show all Versions listing; the Pixelmon guide specifically calls out Forge 2847’s Windows installer in that situation.
- Check the generated files. A successful server installation creates the Forge jar and supporting libraries in the folder you selected. Use the exact Forge jar filename shown there when you create the launch command; do not rename it casually because the command must point to the real file.
- Create a launch script. Allocate the documented 3 GB with
-Xms3G -Xmx3Gand run without the graphical interface usingnogui. In a Windows.batfile, the command has this form:
java -Xms3G -Xmx3G -jar {{FORGE_JAR_FILENAME}} nogui
pauseReplace {{FORGE_JAR_FILENAME}} with the exact Forge jar filename in the server folder, including its .jar extension. The double-curly text is a command-file variable marker for this article, not a filename you should type literally. If the host cannot spare 3 GB, reduce both memory values only after confirming that the machine still meets the server’s needs; the Pixelmon guide’s stated minimum remains 3 GB.
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On macOS or Linux, open Terminal, change to the server directory, and run the same Java command with the actual jar name:
cd /path/to/Pixelmon-1.7.10-Server
java -Xms3G -Xmx3G -jar {{FORGE_JAR_FILENAME}} noguiKeep the terminal window or script process running while players are connected. The server console is where you will accept commands and read startup errors.
Accept the Minecraft EULA and complete the first launch
The first Forge launch normally creates eula.txt and then stops. This is expected; the server will not generate a playable world until the EULA is accepted.
- Open
eula.txtin the server folder. - Read the Minecraft EULA. If you agree to it, change
eula=falsetoeula=true. - Save the file as plain text without changing its name or adding an extra extension.
- Run the same launch script again.
- Wait for Forge to finish creating the world and report that the server is ready for commands.
If the server stops with the EULA message again, check that the file was saved in the same directory as the Forge jar, that the value is exactly true, and that your editor did not save a second file such as eula.txt.txt.
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Add Pixelmon 3.5.1 to the Forge server
Do this only after the Forge server has launched successfully once. A clean first launch confirms that Java, Forge, and the selected folder work before Pixelmon is introduced.
- In the running server console, enter
stopand wait for the process to close cleanly. - Open the server folder and locate
mods. Forge creates this folder during setup; if it is absent, confirm that you are in the folder containing the Forge jar and launch files. - Download the Pixelmon 3.5.1 server jar from the Pixelmon release source.
- Place that jar directly inside
mods. Leave it compressed as a jar: do not extract it, open it, or rename its internal files. - Start the Forge server again with the same Java command.
The server variant is the smaller file intended for dedicated servers. The universal variant is intended for client use and is not the correct substitute for a server installation.
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| Pixelmon file | Intended use | What to do |
|---|---|---|
| Server jar | Dedicated Forge server; smaller variant according to the guide | Put the unchanged jar in the server’s mods folder. |
| Universal jar | Client-side installation | Use on players’ clients when the release instructions identify it as the client file; do not use it as the dedicated server jar when a server variant is provided. |
During the restart, watch the console for Pixelmon loading messages. Once the server reaches its ready state without a crash, it has the core mod installed.
Configure Pixelmon after it loads
Pixelmon stores its server configuration in config/pixelmon.hocon. Stop the server before making a broad configuration change, keep a backup of the file, and edit it with a proper plain-text editor rather than a word processor.
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Understand reloadable and startup settings
Some settings can be refreshed with the in-game or console command /pokereload. Others require a complete server restart. The configuration guide also warns that certain world-generation and gameplay choices apply only to fresh chunks; changing the value does not retroactively rebuild terrain that already exists.
For a predictable test, make a copy of the world before changing generation-related options, then explore newly generated areas after the server is restarted. Keep a record of edits so you can identify which change caused a behavior difference.
Prepare every player’s client
Each player needs Minecraft: Java Edition 1.7.10, the matching Forge client, and the same Pixelmon release used by the server: 3.5.1. The Pixelmon guide states, “Players connecting to a server must use the same version of Pixelmon that the server is using.”
- Install or select the Minecraft Java Edition 1.7.10 profile in the launcher.
- Install the Forge client build that matches the server’s 1.7.10 Forge environment.
- Install the client-side Pixelmon file intended for that release.
- Launch the Forge profile once and confirm Pixelmon appears in the installed-mod list.
- Connect using the server address only after the server console reports that it is ready.
A Pixelmon version mismatch causes a Mod Rejection error and prevents the login. Compare the complete version number on the server and client rather than assuming that two files with similar names are interchangeable. If sidemods are installed, clients may also need the compatible client-side files required by those mods.
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Let players connect on your network
Same local network
For a household or school network, give players the host computer’s local IP address, such as the address shown by the operating system’s network settings. They should enter that address in Minecraft’s multiplayer screen. The host computer must be connected to the same router, and its firewall must allow Java or the server process to accept connections.
This arrangement is local hosting: it generally serves players on the same local network and does not automatically make the server reachable from the internet.
Players outside the network
Remote players normally require three things:
- A stable local address for the host computer, so the router’s forwarding rule continues pointing to the right machine.
- A router port-forwarding rule that sends the Minecraft server port to that computer.
- An operating-system or security-software firewall rule allowing the same traffic.
Minecraft’s official server documentation identifies 25565 as Java’s default server port. Use the port shown in server.properties if you changed it, and forward that port using the appropriate protocol and destination for your router. Do not publish your home address or open unrelated ports; share only the connection details players need.
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Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Add sidemods and SpongeForge carefully
Optional sidemods are version-sensitive. Choose each one from a compatibility list for Pixelmon 3.5.1 and read its individual requirements before copying files.
- Stop the server with
stop. - Verify that the sidemod supports Minecraft 1.7.10, the selected Forge build, and Pixelmon 3.5.1.
- Place the sidemod jar in the server’s
modsfolder without extracting it. - Install SpongeForge only when the sidemod requires it, using the recommended SpongeForge jar for this environment.
- Add a permissions plugin such as LuckPerms only when the chosen Sponge-based extension calls for one.
- Restart and inspect the console for dependency or version errors before inviting players back.
Add one extension at a time. That makes a startup failure attributable and gives you a clean point to remove the newest file. Clients may need matching sidemod files when an extension is not server-only.
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Troubleshoot the common failures
The server exits immediately or reports an unsupported Java version
For this 1.7.10 Pixelmon setup, verify that the command is using a 64-bit Java 8 executable. A system can have several Java versions installed; checking java -version in a terminal opened from the launch script’s environment helps reveal which one is actually being called. Correct the path, then start the server again.
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The process runs out of memory or becomes unresponsive
Confirm that both memory flags are set and that the machine can supply the requested amount. The documented starting allocation is -Xms3G -Xmx3G. Reduce other applications, avoid allocating more memory than the host physically has, and increase the allocation only when player count or installed extensions requires it. Persistent pauses after adding a sidemod point to an oversized or incompatible mod set rather than a missing command-line flag.
Pixelmon does not appear after restart
Stop the server and check that the unchanged Pixelmon 3.5.1 server jar is directly in the active server’s mods folder. Verify that you did not place it in a client’s mods directory, extract it into a subfolder, or start a different Forge folder by mistake. Read the startup log for a failed dependency or a malformed download.
The EULA message keeps returning
Make sure eula=true is saved in the same directory that contains the Forge jar. Check for a hidden second extension and confirm that the account running the server has permission to read the file after saving it.
A client receives Mod Rejection
Compare the client’s Pixelmon release with the server’s installed release and verify that both use the 1.7.10 environment. Remove an unintended duplicate jar from the client’s mods folder, then launch the correct Forge profile again. Treat the complete installed-mod list as the source of truth, not the profile name shown in the launcher.
Friends cannot connect remotely
First test a local connection. If local players can join, check the external address, the forwarded port, the host computer’s firewall rule, and whether the router forwards to the current local IP. Confirm that the server is running and listening on the same port players are using. If the internet service blocks inbound connections, use managed hosting or another network arrangement rather than repeatedly opening additional ports.
The server crashes after a sidemod is added
Stop it, remove the newest sidemod, and launch the known-good configuration. Then check the extension’s exact Pixelmon, Forge, Minecraft, SpongeForge, and permissions requirements. Reintroduce only a compatible file and add further extensions individually.
A configuration change seems to do nothing
Use /pokereload for settings documented as reloadable and restart for settings that require startup. If the option affects world generation, inspect newly generated chunks; existing chunks may retain their original behavior.
Operate the server safely
- Use the console command
stopbefore closing the terminal or rebooting the host so world data is flushed cleanly. - Back up the world folder and configuration before changing Pixelmon settings or adding a sidemod.
- Keep a copy of the exact Forge, Pixelmon, and sidemod filenames that produced a working launch.
- Apply changes during a maintenance window and let players know when the server is offline.
- Do not mix client and server jars, and do not update one side without planning the matching update for every player.
Final setup checklist
- Minecraft Java Edition 1.7.10 is selected.
- 64-bit Java 8 is installed and is the runtime used by the launch command.
- The Forge installer was run with Install server in a dedicated folder.
- The first launch generated
eula.txt, and the accepted value iseula=true. - The launch command points to the exact Forge jar and allocates at least 3 GB when the host can support it.
- Pixelmon 3.5.1 server jar is unchanged and stored directly in
mods. - Every client uses Minecraft 1.7.10, matching Forge, and Pixelmon 3.5.1.
- Local players use the host’s local address; remote players have the correct port and firewall arrangement.
- Each sidemod is confirmed compatible before installation, with SpongeForge and a permissions plugin added only when required.
With those conditions met, the 1.7.10 Forge server and Pixelmon 3.5.1 are using the pairing documented by Pixelmon Mod Wiki (2023), while the Java Edition requirement and default port guidance follow Minecraft’s official server documentation.
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