Battle Crashing

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During the transition period between talking to a trainer and battling them, you know when the screen flashes and darkens out in various different ways before coming into the battle? During that point, my game tends to crash a lot and freeze, then give me the option to save, and the message that 'The script is hanging.' - I play a lot more intensive games than Reborn, so I can't figure out why it crashes like it does.