I've had multiple and recurring game crashes with these error messages upon crash (Only one error is given per crash, but these are the ones that I've seen):
Script 'PokeBattle_Battle' line 2726: NoMethodError occurred. undefined method '' for nil:NilClass
Script 'PokeBattle_Battler' line 650: NoMethodError occurred. undefined method '' for nil:NilClass
Script 'PBIntl' line 498: TypeError occurred. no implicit conversion from nil to integer
I believe the 498 crash occurs whenever a wild pokemon uses Worry Seed on me.