Pokemon Gale of Darkness?

Ben Rouse Asked: Pokemon Gale of Darkness?

Not very far into game, and at the moment my team consists of
Shroomish lvl 24 grass
Gulpin lvl 26 poison
Flaaffy lvl 30 electric
Vaporeon lvl 34 water
Ledian lvl 29 bug/flying
Houndoom lvl 32 fire/dark

is this a balanced team? I'm missing a psychic pokemon in there, although ledian can learn some psychic moves.
Have a load of pokemon in storage/purify, How could this team be improved, out of pokemon I should already have in storage and stuff?