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I just downloaded Pixelmon 4.1.0 and every time i join a single player world it crashes. I have forge installed.

---- Minecraft Crash Report ----

WARNING: coremods are present:
CCLCorePlugin (CodeChickenLib-1.8-1.1.2.133-universal.jar)
Java8CheckerCoremod (Pixelmon-1.8-4.1.0-universal.jar)
Contact their authors BEFORE contacting forge

// My bad.

Time: 11/15/15 3:26 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at net.minecraft.client.gui.inventory.GuiContainer.func_146281_b(GuiContainer.java:685)
at net.minecraft.client.Minecraft.func_147108_a(Minecraft.java:918)
at net.minecraftforge.fml.client.FMLClientHandler.showGuiScreen(FMLClientHandler.java:479)
at net.minecraftforge.fml.common.FMLCommonHandler.showGuiScreen(FMLCommonHandler.java:344)
at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:103)
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2295)
at com.pixelmonmod.pixelmon.TickHandler.onPlayerTick(TickHandler.java:41)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_44_TickHandler_onPlayerTick_PlayerTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPreTick(FMLCommonHandler.java:386)
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:219)
at net.minecraft.client.entity.EntityPlayerSP.func_70071_h_(EntityPlayerSP.java:119)
at net.minecraft.world.World.func_72866_a(World.java:1880)
at net.minecraft.world.World.func_72870_g(World.java:1850)
at net.minecraft.world.World.func_72939_s(World.java:1679)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2095)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1029)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.client.gui.inventory.GuiContainer.func_146281_b(GuiContainer.java:685)
at net.minecraft.client.Minecraft.func_147108_a(Minecraft.java:918)
at net.minecraftforge.fml.client.FMLClientHandler.showGuiScreen(FMLClientHandler.java:479)
at net.minecraftforge.fml.common.FMLCommonHandler.showGuiScreen(FMLCommonHandler.java:344)
at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:103)
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2295)
at com.pixelmonmod.pixelmon.TickHandler.onPlayerTick(TickHandler.java:41)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_44_TickHandler_onPlayerTick_PlayerTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPreTick(FMLCommonHandler.java:386)
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:219)
at net.minecraft.client.entity.EntityPlayerSP.func_70071_h_(EntityPlayerSP.java:119)
at net.minecraft.world.World.func_72866_a(World.java:1880)
at net.minecraft.world.World.func_72870_g(World.java:1850)

-- Entity being ticked --
Details:
Entity Type: null (net.minecraft.client.entity.EntityPlayerSP)
Entity ID: 499
Entity Name: GlairMark
Entity's Exact location: -62.50, 64.00, 134.50
Entity's Block location: -63.00,64.00,134.00 - World: (-63,64,134), Chunk: (at 1,4,6 in -4,8; contains blocks -64,0,128 to -49,255,143), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: 0.00, 0.00, 0.00
Entity's Rider: ~~ERROR~~ NullPointerException: null
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1679)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['GlairMark'/499, l='MpServer', x=-62.50, y=64.00, z=134.50]]
Chunk stats: MultiplayerChunkCache: 0, 0
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: -56.00,64.00,144.00 - World: (-56,64,144), Chunk: (at 8,4,0 in -4,9; contains blocks -64,0,144 to -49,255,159), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 67 game time, 67 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 1 total; [EntityPlayerSP['GlairMark'/499, l='MpServer', x=-62.50, y=64.00, z=134.50]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:351)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2503)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:366)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 34904848 bytes (33 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1556 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1556.jar)
UCHIJAAAA Forge{11.14.3.1556} [Minecraft Forge] (forge-1.8-11.14.3.1556.jar)
UCHIJAAAA pixelmon{4.1.0} [Pixelmon] (Pixelmon-1.8-4.1.0-universal.jar)
Loaded coremods (and transformers):
CCLCorePlugin (CodeChickenLib-1.8-1.1.2.133-universal.jar)
codechicken.lib.asm.ClassHeirachyManager
codechicken.lib.asm.RenderHookTransformer
Java8CheckerCoremod (Pixelmon-1.8-4.1.0-universal.jar)

GL info: ' Vendor: 'Intel' Version: '3.1.0 - Build 9.17.10.4229' Renderer: 'Intel(R) HD Graphics 3000'
Launched Version: 1.8-forge1.8-11.14.3.1556
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.4229, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)