I'm going to have to respectfully disagree with those of you who want Pokemon to have another DLC character.
Frankly, I don't want ANY series within DLC to get another character. I don't want Mario to get one either. To me, there are immediate diminishing returns to the majority of fans if you add more than one DLC character from the same series. Despite Pokemon being the series that it is, this is Smash. It's not like roster balance doesn't matter or something.
It's a matter of preference however. You aren't wrong if you want another Pokemon character, but those like me who don't want another Pokemon character aren't wrong either.
Part of me also sees WHY a grass type would be good to have and I also think it will eventually happen at this rate, however I don't think it's a good reason to include a character. That's like the whole "villain rep" or "female rep" thing. Granted, I can see the advantage of adding a character like Sceptile for example but I wouldn't get your hopes up in thinking they'll add another one...right now anyway.
To put it into perspective, think about the characters that people want and the series they come from:
Wolf from Star Fox (who was also cut and whose series only has 2 characters),
Bandanna Dee (fairly well sized series with 3 characters, and is a character who would play differently from the rest of the Kirby characters),
K.Rool (Pretty popular series that only has TWO characters),
Dixie Kong (see K.Rool),
Inklings (interesting character from a brand new series that made it big, and fast!),
Isaac (popular newcomer choice from an arguable niche series. popular for many years),
Solid Snake/Big Boss (cut veteran from an iconic gaming series that many fans want to return), etc... There are more, and I am purposely focusing on series aside from Pokemon, but my point is that there are plenty of characters out there that would satisfy a lot of people that aren't from Pokemon as a series.
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On a side note, Happy Thanksgiving everybody! Enjoy your day with family, friends and eat until your feel like you want to die!