Just beat Grant. Trying to go through the game slowly, currently leveling Inkay in Day Care.
Current team:
Ivysaur Lv. 25
Frogadier Lv. 27
Inkay Lv. 23+
No one knows yet, but it's probable that it doesn't evolve simply by leveling up, because that's your rival's Goodra and 49 to 70 it's a glaring difference.
I hope they fixed the GTS with all the Kyurem, lv. 9 and under ********
Also, I hope they fixed the level requesting system. Lv. 10 and up etc. What if I want a Lv. 10-20 Pokémon and not some abused lv. 79 hag I won't be able to use