So, Amarusu. If Freeze Skin turns all Normal Type moves into Ice type, what would be the OP moves for it?

I know a few people have suggested Giga Impact, but there's a tonne more. Fake Out would be a nice one to have.

I suppose theoretically (I don't think Amarusu will get it despite being part rock-type) it could also have Explosion that can't be negated by a ghost type.

Thoughts?