Kerry Archer
Shiny charizard, true shiny greninja and I miss the white lucario from brawl. shadow and silver skins for sonic maybe and just generally more distinct variation for characters like sonic and Pac man, esp on the smaller handheld screen to see what's what better.
Though I love that the Bowser Jr skins are the other koopa kids, with anouncer clips for their names and everything,
EDIT: Oh! And I just found Stars and Stripes Mario, lol, it's wonderful!
Wait, it's not Shiny? I thought those were the Shiny colors.
Oh no wait, it's black and white, right?
I don't know if that Lucario was white, persay, but it was more of a grayscale on the lighter side with the golden spikes. The new one is still grayscale, but more on the charcoal side.
As much as I'd love Silver as a skin, Sonic's moveset just wouldn't work for him, since he's mainly a special attacking character. Maybe Amy would be a better choice, but I would take a Silver alternate in a heartbeat, yes.
Bowser kids are amazing, they really went all out on that.
AND MARIO IS ALL FOR 'MURICA. THAT'LL TEACH THE COMMIES.