Bravely Second - Neo Goldie (99)
Goldies attacks are mostly of physical type, so setting up a Soul Mirror takes care of about all damage sources. The only attack that bypasses it is Bouncy Ball, which can only deal 9999 damage though, so once again Auto Undo safes the day. The only thing that could in theory happen is that Goldie confuses itself and then Devours Yew (which causes instant death). It is an exceedingly rare occurrence though, especially as Goldie has a hard time confusing itself with this setup.
For the offense, it is worth noting that Neo Goldie does NOT have 9999 defenses. They are pretty high regardless, but not impassable. I switched back to Chainspell instead of Pierce M.Def, and since Yew had some spare time had him use Noble Eagle, buffing the Ghosts M.Atk to 200%. Due to Phyxical Reflect, I was able to just ignore enemies getting the benefit as well.
Neo Goldie also has no bun to steal, but can drop an Unearthly if you fight the golden frame version.