Meanwhile... with Fox.
Samus's footstep sounds are both cool and funny. They're like "boop, boop, boop". Everything else sounds great except for her Charge Shot, but that's me being biased to the Prime series' sound effects for her charging beams.
Captain Falcon lost his "clink" or "clank" sound for his movement. It was weird... In SSB4, it's more like a jet or space shuttle's "fire". It's like "swoosh" or something and fits him more. Ike's footsteps and movement sounds are just heavy and awesome. Same with Ganondorf where you can feel the weight behind him moving and hitting you.
Zelda's Din's Fire and Uair sound effects... Eh, I don't like them. The magic start-up sound is kind of weird to me; the fire effects are fine, but the "whaa" sound effect is weird and a giant telegraph.
Oh, and Bowser Jr.'s Abandon Ship! voice clip is a adorable: "whee" or something like it. It's so cute and totally something a kid would do.
Wii Fit Trainer (female)'s "ugah" sound reminds me of uguu... Fans of Kanon know what I'm talking about - I never seen the anime,
but only the clip of Ayu Tsukimiya saying it.