Type chart / Psychic
Psychic Psychic type in Gen 3
Psychic moves are special in Generation 3, so they use the Special Attack and Special Defense stats.
When Psychic attacks
When a Psychic Pokemon defends
Dual-typed Pokemon multiply both types, so a double weakness is 4× damage.
Alakazam
Slowbro
Hypno
Exeggutor
Starmie
Mr. Mime
Jynx
Xatu
Espeon
Slowking
Gardevoir
Grumpig
Claydol
Metagross