As unique as some Fire Emblem characters' play styles are, they are all vaguely anime-esque weapon-wielding characters with serious facial expressions and multi-colored hair from the same series (I say that as someone who wants to see Isaac from Golden Sun in Smash Bros at least he is from a different and under-utilized series). The importance of visual contrast is a shallow but key component when it comes to the game's fighters.
The same can't be said for the remaining Fire Emblem cast, who are essentially interchangeable regardless of how they play. It's fair to say the majority of Smash Ultimate players have never played an F-Zero game, but Captain Falcon would be missed if he weren't included. Fri 23rd Apr I think the argument can be made for both Marth and Roy, as they have tenure.
