Swampert or Wailord.
Rectha
i think slaking.
Roselia, Bellossom or Sceptile.
the best team for battle dome in Pokemon emerald is a grass type(against swampert , and a rock type(against charizard and salamance)
The strongest dragon type in pokemon Emerald, Sapphire and Ruby, is the legendary pokemon Rayquaza. In terms of non-legendary pokemon, both salamance and flygon are strong dragon types.
Rectha
Kyogre.
Water.
i think slaking.
The best water type would be Kyogre but you can't get it in leafgreen you need to get one from sapphire or emerald other than that the best water Pokemon is blastoise.
Most water type Pokemon like tentacool.
Roselia, Bellossom or Sceptile.
In Sootopolis City.Trainers and Gym Leader uses Water-Type Pokemon.
the best team for battle dome in Pokemon emerald is a grass type(against swampert , and a rock type(against charizard and salamance)
The strongest dragon type in pokemon Emerald, Sapphire and Ruby, is the legendary pokemon Rayquaza. In terms of non-legendary pokemon, both salamance and flygon are strong dragon types.
if you mean the starter Pokemon for emerald it's treeko-a grass type, torchic-a fire type, and mudkip-a water type
get a hm called dive attach it to a water type pokemon and go on water and use dive.