Hi, pokemon newbie here need some guidances

Hi, i just start pokemon Emerald not long ago. I am thinking of the following line-up. I need some views and recommendations on this line up if possible ^.^ Thanks in advance!! (P.S please keep to pokemons/skills/items that can only be obtain in pokemon Emerald and no legendaries pokemon)

Swampert
Surf
icebeam
earthquake
(recommendation please or raindance - abandon ship

Gardevoir
calm mind
psychic
Shadow Ball
(recommendation please)

Camerupt
earthquake
flamethrower/fireblast (which is better?)
Rest
erruption

Altaria
sing or recommendation?
sky attack
Dragon claw
dragon breath (recommendation?)

Breloom
Seed bomb
Sky uppercut
Brick Break
Stunspore or mega drain (recommendation?)

Hariyama
bulk up or focus energy(which is better?)
focus punch
Vital Throw
(recommendation)

Camerupt: Flamethrower or Fireblast is your choice really, do you want the better accuracy and lower power? (flamethrower) or high attack power and lower accuracy? (Fireblast)

Hariyama: I personally prefer Focus energy. Because it gives me a better crit ratio and I get lots and lots of crits after using the move.