Some of these alts don't work.
Daisy doesn't work as an alt of Peach because certain elements of Peach's moveset, such as Toad, the float, and Turnips, are very specifically things that belong to Peach and only Peach. Daisy also isn't in Super Mario Bros. 2.
Metal Sonic as a Sonic alt also wouldn't work. Whenever Metal Sonic is a skin for Sonic he still has some different animations. Wouldn't work in Smash.
Linkle hasn't even used a sword and shield yet...why is she an alt of Link here?
Not commenting on the character choices, since there's nothing really wrong with them...although I like the addition of a Fatal Frame rep, Miku would be the default, not Yuuri.
+ Ashley, Elma, Captain Toad, and Lloyd.