Usually I'd go on to this being a Final 2, but this is such a strong final 3 that I figured I would let all of them duke it out.
You will reward points on who you want to win... For example, if the final 3 were Torterra, Infernape, and Empoleon you could vote:
Torterra: 2 points (most want to win)
Empoleon: 1 point
Infernape: 0 points (least want to win)
I will tally up all the points and whoever has the most points will WIN!
Option A: 2 points
Option B: 1 point
Option C: 0 points
Give 2 points to who you MOST want to win. Give 0 points to who you LEAST want to win.