>>58011033 (OP)Both are good. Unova, unlike other games, wanted to introduce brand new pokemon even late into the game that weren't just single staged, new gen evos, or legendaries. Doing this means that you can keep on experimenting with your team all the way till the end of the main story. However, it would be a little odd if they gave you the evolution and had the base form pokemon completely irrelevant in the debut game, so they had to be in base form at high levels. Most pokemon (everything other than early route bugs) should also get a chance to stick around in their forms before evolving. It creates a dynamic of you wanting to raise a new partner, but understanding that they may need a little extra care than your other teamates at this point in the game. ~10 levels seems appropriate for this length. So I think BW did this pretty well. However, these pokemon are also available much earlier in the future games (getting Rufflet right after the first trial in Alola or Noibat right before it comes to mind). Their stats were (well not in Noibat's case) designed to be somewhat servicable in Unova's late game, so they're quite the powerhouse early on. But then they still don't evolve into the late game, so you're stuck with them for much longer, and that sweet spot of ~10 levels of extra care overstays its welcome by a lot. They should really change the evolution requirements on a game by game basis. For Rufflet in Alola, I'd say level 39 is appropriate as that's just before you fight Guzma, so you are rewarded with a powerful flying type after so long. Braviary is more powerful than nearly any other normal flying starting bird (in game at least) but being available ~10 levels later than Toucannon is a tradeoff that the player can choose.