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Hello. So, I have downloaded Pixelmon. I made sure I had the correct version of Forge and I had removed all my mods. So, I load on Minecraft, and it first says not responding, than crashes. I have redownloaded it about 5 times but it keeps crashing. Here's a crash report:

--- Minecraft Crash Report ----

WARNING: coremods are present:
Java8CheckerCoremod (Pixelmon-1.8-4.0.8-universal.jar)
Contact their authors BEFORE contacting forge

// But it works on my machine.

Time: 11/6/15 8:46 PM
Description: Initializing game

java.lang.IllegalStateException: Splash thread
at net.minecraftforge.fml.client.SplashProgress.checkThreadState(SplashProgress.java:485)
at net.minecraftforge.fml.client.SplashProgress.finish(SplashProgress.java:538)
at net.minecraftforge.fml.client.FMLClientHandler.haltGame(FMLClientHandler.java:297)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:326)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:491)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
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.minecraftforge.fml.client.SplashProgress.checkThreadState(SplashProgress.java:485)
at net.minecraftforge.fml.client.SplashProgress.finish(SplashProgress.java:538)
at net.minecraftforge.fml.client.FMLClientHandler.haltGame(FMLClientHandler.java:297)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:326)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:491)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
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: 702064 bytes (0 MB) / 523501568 bytes (499 MB) up to 523501568 bytes (499 MB)
JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1450 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
UCHI mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHI FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1450.jar)
UCHI Forge{11.14.3.1450} [Minecraft Forge] (forge-1.8-11.14.3.1450.jar)
UCHE pixelmon{4.0.8} [Pixelmon] (Pixelmon-1.8-4.0.8-universal.jar)
Loaded coremods (and transformers):
Java8CheckerCoremod (Pixelmon-1.8-4.0.8-universal.jar)

GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 10.18.15.4256' Renderer: 'Intel(R) HD Graphics 5500'
Launched Version: 1.8-Forge11.14.3.1450
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 5500 GL version 4.3.0 - Build 10.18.15.4256, 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)

Just try and tell me what to do without confusing me too much. Thank you.