The codes below can be used when speaking to Munna in Easterly Town to get Pokemon at the level noted. Beat the Pokemon to get them:

Electric Up Pikachu (3-2 Volcanic Slope): 7580-5216

Fire Boost Tepig (2-2 Misty Edgewater): 5487-0833

Grass Boost Snivy (2-3 Soothing Shore): 4941-6440

Lugia (2-4 Shimmering Lake):
3467-3843

Victini (2-1 Sun-Dappled Bank):
9082-7838