Gym leaders: 0 IV
Pokemaniacs: 3 IV
Tamers: 4 IV
Psychics: 6 IV
Black Belts: 12 IV
Cooltrainers: 12 IV
E4 members: 30 IV

Rival 1: 0 IV
Early Viridian Rival: 6 IV
Cerulean Rival: 6 IV (ace is 12)
S.S. Anne Rival: 6 IV (ace is 12)
Lavender Rival: 12 IV
Silph Rival: 12 IV (ace is 18)
Late Viridian Rival: 18 IV (ace is 30)
Champion: 31 IV

Rocket Hideout Giovanni: 30 IV
Silph Giovanni: 30 IV

All other trainers: 0 IV