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I think it fits perfectly when you think about it, but only with the young, Brawl Ike.
See Samus doesn't really ship well with anyone just because of how independent she is, like when people shipped her with Snake that was just weird cuz now it's like two tough, independent, not-showing-much-emotion characters are together? BORING.
But with Ike it's so perfect because he's like an underdog character, young and full of passion, therefore bringing out another side of her, it complements PERFECTLY
it doesn't work with the older Smash 4 Ike because it's like now he's all tough and buff and stuff it's just the whole "tough strong guy gets the girl" which is old it's like Snake all over again