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---- Minecraft Crash Report ----
WARNING: coremods are present:
 Java8CheckerCoremod (Pixelmon-1.8-4.1.3-universal.jar)
Contact their authors BEFORE contacting forge
// Daisy, daisy...
Time: 12/21/15 10:46 AM
Description: There was a severe problem during mod loading that has caused the game to fail
net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraftforge/common/util/EnumHelper
 at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:163)
 at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:516)
 at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:210)
 at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:414)
 at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:326)
 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:497)
 at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
 at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/common/util/EnumHelper
 at com.pixelmonmod.pixelmon.Pixelmon.<clinit>(Pixelmon.java:53)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java:348)
 at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:445)
 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:497)
 at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
 at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
 at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
 at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
 at com.google.common.eventbus.EventBus.post(EventBus.java:275)
 at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
 at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
 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:497)
 at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
 at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
 at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
 at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
 at com.google.common.eventbus.EventBus.post(EventBus.java:275)
 at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
 at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:505)
 ... 10 more
Caused by: java.lang.ClassNotFoundException: net.minecraftforge.common.util.EnumHelper
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 ... 36 more
Caused by: java.lang.NullPointerException
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
 ... 38 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
 Minecraft Version: 1.8
 Operating System: Mac OS X (x86_64) version 10.10.2
 Java Version: 1.8.0_60, Oracle Corporation
 Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
 Memory: 82431072 bytes (78 MB) / 306544640 bytes (292 MB) up to 1060372480 bytes (1011 MB)
 JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
 IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
 FML: MCP v9.10 FML v8.0.127.1103 3 mods loaded, 3 mods active
 mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
 FML{8.0.127.1103} [Forge Mod Loader] (fml-1.8-8.0.127.1103.jar) Unloaded->Constructed
 pixelmon{4.1.3} [Pixelmon] (Pixelmon-1.8-4.1.3-universal.jar) Unloaded->Errored
 Loaded coremods (and transformers): 
Java8CheckerCoremod (Pixelmon-1.8-4.1.3-universal.jar)