Alright so my team needs a bit of help... Currently i'm trying to build it up, any suggestions?

My team so far goes

Gyarados (lvl.38)
Heracross(lvl.16 (in training) )
Alakazam (lvl 36)
Larvitar (lvl 26 (in training)
Noctowl (lvl 35)
Luxray (lvl 36)

I'm trying to get all my guys to lvl 45 currently... I've replaced Machamp with Heracross (not so sure about this move) and i filled in my Larvitar for an empty slot... I'm seeing that my only thing missing is a fire type, which I have been searching for.

Suggestions? Help? Hints? Tips?

Also, I just beat the Team Galaxy Boss. What do i do in Mt. Coronet? I have no clue.

P.S. ... Where is a good training spot for trying to get me up to lvl 45/50?