Pink Yoshi is essential.
I also find myself using all of these alt skins:
Peach - White & Red
Link - White or Fierce Deity
Kirby- Black and White
Ganon - Red hair and whiter face I think
Shulk - ; )
Dr. Mario - Black bring me back to them melee days :')
Palutena - Red
ROB - Red and Black
Falcon - Black and lookin like a menacing raven
Sheik - White/Blue/Red
Villager - cutie girl with pink hair
Lucina - BLACK AND YELLOW BLACK AND YELLOW BLACK AND YELLOW BLACK AND YELLOW
Falcon - All gold everythang
Palutena - Red
Megaman - White and Blue
and that's pretty much everyone i shuffle through