The obvious answer is that the cheats don't place nice with Dolphin. As accurate as Dolphin is, it's still not a Wii; not every Gecko code will work, and not every Gecko code will be crash-free.
You can try different cheats altogther or different values for the cheats, but sometimes there's no getting around cheats that won't work, not yet anyway.
You can try different cheats altogther or different values for the cheats, but sometimes there's no getting around cheats that won't work, not yet anyway.