Who has the best design?
Who's better in battle?
Not Torkoal, that's for sure. Any of the others could possibly win.
Who would win a battle between them?
Not Torkoal, for the same reason as above.
Who's your favorite?
Turtle with cannons in its back.
I'm going with Blastoise because I've actually used it. While I think Torterra has a slightly better design, there's nothing wrong with the original turtle's. Plus I've always liked the Squirtle line.
Abagoura looks cool too, despite having a less-than-stellar type combo. Torkoal I don't really care for (shocking I know.)
Torkoal can be Raphael since he's such a hothead.