How do you unlock characters in Mario Golf 64?

Beat all of the ring shot levels, on one player mode choose get character mode then verse the character and if you win you unlock that character. Characters unlocked from this mode are: luigi, Yoshi, sonny, wario, harry, Mario, bowser. Also if you get 50 birdie badges in tournament mode you get maple, and if you get all the badges you get the best of best characters metal Mario who's power is 280yrds!