Okay, but you can only include so many Pokemon before it gets stale. Maybe if they included a trainer or something, it'd be better.
This doesn't make any sense. The exact same blanket statement could be made to literally every other series, including Fire Emblem. Each Pokemon is sporting a completely different type with different movesets and drastically different designs. In fact, the Pokemon we have in the game look far more different from each other than the Fire Emblem characters do - we have three FE representatives with a sword and blue hair.
Let's face it, Zelda is an amazing franchise, but their reuse of characters doesn't give any characters an individual identity.
This is so strange in the face of Fire Emblem though, since Zelda does almost the exact same thing. Zelda gives us some pretty unique characters in each game that are different, just like how FE usually uses characters for just a single game as well. Characters such as Midna, Linebeck, Ghirahim, and others definitely have a personality that stuck with people despite those and others not being featured in future games.
Also, why does Fire Emblem get characters to promote games when Zelda doesn't? Is it just because Fire Emblem isn't as popular as Zelda? If that's the case, why isn't Starfox getting the same treatment with their new game being right around the corner? It's just so strange.
Fire Emblem may not be the best selling franchise, but it certainly deserves rep. Hell, the only reason Fire Emblem was brought to the west was because of Roy and Marth being included in Melee, so I'd be damned to say that I'm perfectly fine with more FE characters.
I don't think anyone is arguing that Fire Emblem doesn't deserve characters. I'm an incredibly huge fan of the series and didn't really have a problem with five characters, because in actuality it was three characters and two clones that were just kind of a bonus. But this sixth one, no matter how unique, has really made Smash seem like the FE Promo show, which is a problem in the face of other series which probably deserve at least one more character (Like Donkey Kong and Metroid).