battle sprite corruption

unfortunately it seems the entire event was removed and i cannot even get to the invasion of narshe.

FF6LE doesn't erase complete events. It's not because you have a black screen that the event is erased. However, if you're using FF6LE Rogue, saving with it can lead to Serpent Trench map corruption or mine cart event corruption. The kind of corruption you're talking about is new to me, but it could be caused by FF6LE Rogue, who knows...