Pikachu, Link, and then a secondary Mario/Pokemon character. All pretty close hand-in-hand, but that feels right.
The only thing that causes me to hesitate on Link is that I feel the symbols of Zelda are far more iconic than Link himself. If the Triforce was a character for instance, I'd easily put that over Pikachu as #2.
I can see the argument that Peach or Yoshi are better secondary Mario characters than Luigi.
SSBM_Guy
"[Freud] started his scientific career by trying to explain the sexuality of a fish. And he failed."