Like:-
1st) Level - i dont like to see those big numbers in the exp bar , and it will keep getting bigger..
so just like pokemon, the level of member should increase after obtaining a particular amount of exp.
then the exp. will again start from 0..
(it would look better if there's an experience bar, like the one in game)
2nd) Every member should be given a "Nature"..
and there should be a "Pokedex" button, which shows all the members, and how many we are friends with..
3rd) i am also thinking abt gym badges and pokemon league.. but i dont yet have an idea of how it should be..