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Yeah, that sounds good if you sink 40 UC in to sweeten the deal? :3 It's coming out of a raid so will have like 70-odd moves by the time you get it, so I think asking for at least a 60-ish move metagross isn't that far of a stretch.
JSYK, "untargetable" is the term zar prefers people to use when subbing against Fly/etc in raids. Just since the system doesn't technically allow for you to sub against the boss using specific moves.