Melee: Marth, Fox
Brawl: Meta-Knight
4: Roy, Diddy Kong

You would have, but you picked up other mains so you didn't get it :p

Smash64: Link
Smash Melee: Link, Roy
Smash Brawl: Link, Snake and Sanic
Smash 4: Link, Toon Link, Shulk, Lucina and Megaman

Smash 64: Kirby, Mario
Melee: Never played it
Brawl: I barely played Brawl, but it was Link and Marth
Smash 4: Captain Falcon, Toon Link

... Your name is mr yoshi but you don't main yoshi in smash 4 when he is awesome in it? Am I really the only yoshi main for smash 4 on vgc?

Smash 64: Samus

Melee: Samus

Brawl: Samus

Smash 4: Samus, Lucina and Pac-Man

Pikachu, Mega Man, Ryu.

64: N/A (Don't own that one)
Melee: Kirby
Brawl: Kirby and Samus
Smash 4: Kirby, Mega Man, Samus, and Mewtwo

64: Kirby, Pikachu

Melee: Kirby, Pikachu, Ness

Brawl: Sheik, Toon Link, Kirby, Lucas

4: Sheik, Samus, Zero Suit Samus, Toon Link, Robin, Kirby

I've only played Smash 4 so far and I've mained Bowser, Yoshi, and King Dedede.