metagross and pre evs
gardevoir and pre evs
alakazam and pre evs
medichan and pre ev
grumpig and spoink
xata and natu
solrock+lunatone
latias and latios
jirachi and deoxys
Hope I Helped!
Mew/Celebi/Jirachi
You can buy it at the game corner.
He's fighting type? Use psychic or flying pokemon.
Meditite is in Ruby, Sapphire, and Emerald. It’s Psychic/Fighting and evolves into Medicham starting at level 37.
Tate & Liza in Mosdeep. Psychic type.
Gardevoir. It has very high special attack.
In Pokemon Sapphire, Ruby and Emerald the 7th Gym that's located in Mossdeep City has Psychic type Pokemon.
Here is a list of all pokemon that can learn Psychic: http://www.serebii.net/attackdex/psychic.shtml
Drowzee and Hypno are top choices. but most psychic Pokemon know/can learn Hypnosis.
-Azumarill -Magnetric -Breelom -(A flying pokemon) -(a normal, fighter or psychic)
you battle the psychic twins, tate and lisa, in the mossdeep gym.
Gardevior psychic on tentacruel thunderbolt on the rest except whiscash use Breloom
Psychic (TM 29) is found on Victory Road, while on your way to the Pokemon League. Also I believe you can buy one on the Battle Frontier later in the game.