Re: Splitscreen guest doesn't get to level up?

Unless the second player is using an actual account (not a guest) they will not be able to earn experience as guest accounts are not saved.

I believe after selecting P2 as a guest, there will be a message stating that "They are joining as a guest, and no progression will be saved for them."

If you have more questions, please post in the GW2 forums: http://answers.ea.com/t5/Plants-vs-Zombies-Garden-Warfare/ct-p/pvz-garden-warfare-2-en