Anyway it is time to state my opinion: While Krystal would be a good choice. The fact that she uses a staff and magic doesn't merit her a spot in brawl, b/c when you look at it half the ppl in FE and other RPG's use staff magic.
And how many of those characters are in Smash Bros.?
I am just simply saying that Wolf should take higher priority b/c he has appeared in more games and he also has a smash feel to him.
Slippy has been in more games than both of them. So, by this logic, Slippy should get in before either.
And that last part is just opinion. Every character to me can have a 'Smash feel'. But, then again, I don't think 'Smash feel' actually exists.
And really, what more does Krystal need other than (1) She's important to her series, (2) She has potential for a unique, fun moveset. I remember reading a review of SFA by EGM, in which one reviewer compared the attacks to Soul Calibur's Kilik. There you have it, besides staff magic, we'd also have a character who plays like Kilik, something Smash Bros. currently does not have.