noctowl doesnt learn psychic
Gallade, but he is psychic fighting type.
Route 211
Behind the ELite FOur place.
A Psychic near the entrance to Victory Road.
Psychic Bryce has a gengar in Pokemon platinum.
The first Psychic you'll encounter has one.
master ball
Cresselia found at fullmoon island. Psychic type.
It's the Psychic girl on route 225 who has a Slowbro (you've to battle the psychic girl). In Diamond and Pearl, it even has two Slowbros! In Platinum, she begins with a Slowpoke, and when the Slowpoke is defeated, she'll send in Slowbro.
You get it in exchange for coins at the game arcade in Veilstone City.
There's a Psychic in Victory Road that owns one.