Where do you get up-grade from on diamond

After you get the national dex, fly to Eterna City near the cycling road end and go left until you see a house, Go in and talk to Prof. Oak and he will give you an up-grade. After you get the national dex, fly to Eterna City near the cycling road end and go left until you see a house, Go in and talk to Prof. Oak and he will give you an up-grade. After you get the national dex, fly to Eterna City near the cycling road end and go left until you see a house, Go in and talk to Prof. Oak and he will give you an up-grade.