I don't think Mario/Bowser will get SFFed, and I think they're a stronger pairing than Cloud/Seph.
I don't think Super Mario Bros would've been SFFed by Legend of Zelda in the series contest either. Hell I think Link's ability to SFF Mario is exaggerated in the first place-- Link beats Mario by a boatload because he's a lot stronger for the most part, not due to huge amounts of SFF.
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No problem!
This is a cute and pop genocide of love!