HMPerson1

Make sure your friend has the exact same version of your mods.

Check if there are any other logs.

Do the dimensions render without Mystcraft installed?

Looks like it's Pixelmon that's crashing. Take it to them.

Does this happen when you create a new world, or just when you open old ones?

Use Bearded Octo Nemesis.

Read the rules.

Try making a new world.

Are there any special characters in your username? cpw: Another c14n error?!

Wrong sub-forum

Try using Recommended, not Latest.

Update Forge.

What launcher are you using?

Does minecraft still crash when you launch it?

No, just make an empty coremods folder.

Place them into .minecraft/libs

Try manually creating a coremods folder in your .minecraft cpw: c14n error?? HOW?!?

Read the EAQ.

You need to copy EVERY SINGLE FILE from the minecraft-forge.zip to minecraft.jar. Especially the .cfg files.

GuiAPI shouldn't be needed at all on the server-side.

Try again. This looks to be a one-time issue.

Delete C:/Users/Gumballthechewy/AppData/Roaming/.minecraft/config/forge.cfg

It may be that you can't have non-ASCII characters in your username.

osnapit: Download the following files: http://files.minecraftforge.net/fmllibs/argo-2.25.jar http://files.minecraftforge.net/fmllibs/guava-12.0.1.jar http://files.minecraftforge.net/fmllibs/asm-all-4.0.jar http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-147.jar Once downloaded, move them to .minecraft/libs/

Change the configs for Pam's HarvestCraft Chilipepper. If there's no config for it, poke at MatrexsVigil.