[He rubs at his chin, running different scenarios in his mind as he puzzles out possible evolution methods.]
Normally I might suggest a Metal Coat, though considering it's already Steel type, that might not work. Ghost types seem to respond well to Dawn Stones and Dusk Stones, so you may want to look into those. It could also utilize a completely new item that isn't widely known at this time, but let us hope that it's something that can be readily accessed instead.
[Video]
[He rubs at his chin, running different scenarios in his mind as he puzzles out possible evolution methods.]
Normally I might suggest a Metal Coat, though considering it's already Steel type, that might not work. Ghost types seem to respond well to Dawn Stones and Dusk Stones, so you may want to look into those. It could also utilize a completely new item that isn't widely known at this time, but let us hope that it's something that can be readily accessed instead.