Bugs that I want to fix but don't know how

My shadow character cannot be brought back to life in battle for some reason, does anyone know how to fix this?

Also, some enemies for some reason use an item or something in battle (like a shield) and it distorts the screen for a while, even when the battle script checks out. I often have to erase the whole battle script and start again to ensure it doesn't happen, but I don't like having to do that. Any thoughts on this problem?