Where do I get the Up-grade and Dubious Disc in Pokemon omega ruby/alpha saphhire?

Question

I just caught several porygon at a mirage spot, but how do you get the items necessary to evolve them, and what levels do you suggest I evolve them? (to get the best moveset possible)

Answer 1

You can buy Up-Grade and Dubious Disc at Battle Resort for 32 BP

Source: Serebii

Comments

Also it doesn't really matter what level you evolve them as all 3 evolutions have the same learnset.