Hello, I recently bought a minecraft server from BeastNode and i loaded it with Pixelmon 4.2.7, only to realize i wanted to put plugins in it. I started to do research to attempt to figure out how to get them on a forge server and i stumbled across SpongeForge.
I downloaded the latest version of spongeforge and the one specifically compatible with minecraft forge 1.8.9 and my server will not start.
Any suggestions?
What is displayed? Nothing? An error message? We need some additional information to accurately debug your problem. 
Besides that, welcome to the Sponge community!
I went and looked in my console after adding sponge into it only to find out that the jar file that BeastNode lets people install on their servers is installed with minecraft forge 11.15.1.1722 and i need 11.15.1.1890-1.8.9
So how could i do that?
24.07 22:21:02 [Server] main/INFO [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
24.07 22:21:02 [Server] main/INFO [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[INIT]
24.07 22:21:02 [Server] main/INFO [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[PREINIT]
24.07 22:21:02 [Server] main/INFO [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[DEFAULT]
24.07 22:21:02 [Server] main/INFO [mixin]: Compatibility level set to JAVA_8
24.07 22:21:02 [Server] main/WARN [mixin]: MixinEnvironment::setCompatibilityLevel is deprecated and will be removed. Set level via config instead!
24.07 22:21:02 [Server] main/INFO [mixin]: SpongePowered MIXIN Subsystem Version=0.5.7 Source=file:/mods/spongeforge-1.8.9-1890-4.2.0-BETA-1595.jar Env=SERVER
24.07 22:21:02 [Server] main/INFO [LaunchWrapper]: Loading tweak class name org.spongepowered.asm.launch.MixinTweaker
24.07 22:21:02 [Server] main/INFO [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
24.07 22:21:02 [Server] main/INFO [FML]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from spongeforge-1.8.9-1890-4.2.0-BETA-1595.jar
24.07 22:21:02 [Server] main/WARN [FML]: The coremod chylex.javacheck.Java8CheckerCoremod does not have a MCVersion annotation, it may cause issues with this version of Minecraft
24.07 22:21:01 [Server] main/INFO [FML]: Java is Java HotSpot™ 64-Bit Server VM, version 1.8.0_77, running on Linux:amd64:2.6.32-573.7.1.el6.x86_64, installed at /usr/java/jre1.8.0_77
24.07 22:21:01 [Server] main/INFO [FML]: Forge Mod Loader version 11.15.1.1722 for Minecraft 1.8.9 loading
24.07 22:21:01 [Server] INFO 2016-07-24 22:21:01,642 WARN Disabling terminal, you’re running in an unsupported environment.
24.07 22:21:00 [Server] main/INFO [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLServerTweaker
24.07 22:21:00 [Server] main/INFO [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLServerTweaker
24.07 22:21:00 [Server] main/INFO [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLServerTweaker
24.07 22:20:59 [Multicraft] Loaded config for “Mods: Pixelmon (4.2.7)”
24.07 22:20:59 [Multicraft] Starting server!
24.07 22:20:59 [Multicraft] Loading server properties
24.07 22:20:59 [Multicraft] Server stopped
24.07 22:20:59 [Multicraft] Retrying server startup
24.07 22:20:54 [Multicraft] Server stopped
24.07 22:20:54 [Multicraft] Looks like a crash, check the server console. Return value: 1
24.07 22:20:54 [Multicraft] Server shut down
24.07 22:20:54 [Server] main/INFO [FML]: If this was an unexpected exit, use -Dfml.debugExit=true as a JVM argument to find out where it was called
24.07 22:20:54 [Server] main/INFO [FML]: This is an abortive exit and could cause world corruption or other things
24.07 22:20:54 [Server] main/INFO [FML]: Java has been asked to exit (code 1) by net.minecraftforge.fml.common.FMLCommonHandler.exitJava(FMLCommonHandler.java:648).
24.07 22:20:54 [Server] main/INFO [Sponge]: //
24.07 22:20:54 [Server] main/INFO [Sponge]: /* /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Message : Overwrite target “onPlayerInteract” was not located in target class net/minecraftforge/event/ForgeEventFactory /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Caused by : Unknown /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Error Type : org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Config : mixins.forge.core.json /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Mixin : forge.event.MixinForgeEventFactory /
24.07 22:20:54 [Server] main/INFO [Sponge]: / During phase : DEFAULT /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Failed on class : net.minecraftforge.event.ForgeEventFactory /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Technical details: /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: /---------------------------------------------------------------------------------------------------------------------------------------/
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / * Gremlins are invading your computer. Did you feed a Mogwai after midnight? /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / of Sponge. /
24.07 22:20:54 [Server] main/INFO [Sponge]: / * An error exists in Sponge itself. Ensure you are running the latest version /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / 11.15.1.1890-1.8.9 (you are running 11.15.1.1722) /
24.07 22:20:54 [Server] main/INFO [Sponge]: / correct version of Forge when running Sponge, this version is for /
24.07 22:20:54 [Server] main/INFO [Sponge]: / * You are using the wrong version of Minecraft Forge. You must use the /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / see if the problem goes away. /
24.07 22:20:54 [Server] main/INFO [Sponge]: / * An incompatible Forge “core mod” is present. Try removing other mods to /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Possible causes are: /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / A critical error was encountered while blending Sponge with Forge! /
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: /---------------------------------------------------------------------------------------------------------------------------------------/
24.07 22:20:54 [Server] main/INFO [Sponge]: / /
24.07 22:20:54 [Server] main/INFO [Sponge]: / Oh dear. Something went wrong and the server had to shut down! /
24.07 22:20:54 [Server] main/INFO [Sponge]: / */
24.07 22:20:54 [Server] main/INFO [Sponge]: //
24.07 22:20:54 [Server] main/INFO [mixin]: Instancing error handler class org.spongepowered.mod.mixin.handler.MixinErrorHandler
24.07 22:20:50 [Server] main/INFO [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.server.MinecraftServer}
24.07 22:20:50 [Server] main/WARN [mixin]: Method overwrite conflict for requiresCacheRefresh in mixins.common.entitycollisions.json:MixinEntity_Collisions, previously written by org.spongepowered.common.mixin.entityactivation.MixinEntity_Activation. Skipping method.
24.07 22:20:50 [Server] main/WARN [mixin]: Method overwrite conflict for requiresCacheRefresh in mixins.common.entitycollisions.json:MixinEntity_Collisions, previously written by org.spongepowered.common.mixin.entityactivation.MixinEntity_Activation. Skipping method.
24.07 22:20:50 [Server] main/WARN [mixin]: Method overwrite conflict for setModDataId in mixins.common.entitycollisions.json:MixinEntity_Collisions, previously written by org.spongepowered.common.mixin.entityactivation.MixinEntity_Activation. Skipping method.
24.07 22:20:50 [Server] main/WARN [mixin]: Method overwrite conflict for getModDataId in mixins.common.entitycollisions.json:MixinEntity_Collisions, previously written by org.spongepowered.common.mixin.entityactivation.MixinEntity_Activation. Skipping method.
24.07 22:20:45 [Server] main/INFO [LaunchWrapper]: Calling tweak class org.spongepowered.asm.mixin.MixinEnvironment$EnvironmentStateTweaker
24.07 22:20:45 [Server] main/INFO [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
24.07 22:20:45 [Server] main/INFO [LaunchWrapper]: Loading tweak class name org.spongepowered.asm.mixin.MixinEnvironment$EnvironmentStateTweaker
24.07 22:20:45 [Server] main/INFO [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
24.07 22:20:44 [Server] main/INFO [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
24.07 22:20:44 [Server] main/INFO [mixin]: Initialised Mixin FML Remapper Adapter with net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper@56f0cc85
24.07 22:20:43 [Server] main/INFO [LaunchWrapper]: Calling tweak class org.spongepowered.asm.launch.MixinTweaker
You appear to be quite a few builds behind. When you download sponge, open all downloads and find the most recent one. “Recommend” doesn’t always have the right version.