Lets face it. All the main characters in this game have one great way to make shots.
The megastrike. Of course you can power up your ball and pass to them. DK, Bowser, and some others can make some pretty good shots from anywhere with a powered up ball, but any of the characters can make the lob pass shot with it powered up.
Peach and Diddy Kong ARE the best main players there are. They can leap over the Goalie, giving them a third way to make a goal.
Having said that
My team is
Diddy Kong - 3 ways to score, Playmaker
Birdo - Defense, Hell of a shot like DK, power shot always hits if you dont hit another player
Dry bones - We all have him, lets face it, fast, defense, and great power shot.
Koopa- Balanced player, His power shot always makes it to the goalie and leaves an open goal shot every time.
These are a must on a team.
Diddy Kong / Peach / Toad - Able to leap over goalie
Birdo / Hammers Bros - Unstoppable power shot
Koopa - Best out of the balanced players
Dry Bones - Only defense guy around - Plus Power shot is very good