Pony Fantasy VI Remake

You don't need to expand the clean ROM to 32 MB, that's the problem. You do however need to make sure they both have headers or no header though so you're good there. But yeah just select that clean ROM first, then your hack, and it will spit out the ips that can be patched to a non-expanded clean ROM. In other words the patch created from your hack will expand that clean ROM for you via the patches data.