I think that the fact that Falco and Fox shares the same moveset is because they are from the same space fighting team, which kinda would make sense. Not sure if this applies to Ness/Lucas though as they don't match this thought
But I really can't imagine why Black Shadow would mimic C. Falcon in any way, given that 1- he already has Blood Falcon for that, and 2- just because they race in the same competition, that doesn't mean they should share moves (unless i'm missing something here, not too keen on F-Zero lore)
Note that I am not saying, 'ganon is A-OK' but more like 'you shouldn't go wild on already consagrated attack/moveset'. If these moves are added as alternate moves (now SSB allows this) then it's perfect
But I really can't imagine why Black Shadow would mimic C. Falcon in any way, given that 1- he already has Blood Falcon for that, and 2- just because they race in the same competition, that doesn't mean they should share moves (unless i'm missing something here, not too keen on F-Zero lore)
Note that I am not saying, 'ganon is A-OK' but more like 'you shouldn't go wild on already consagrated attack/moveset'. If these moves are added as alternate moves (now SSB allows this) then it's perfect