>>26711486I got it before the second gym, when my starter was still a Frogadier. Vaporeon is insanely good in the early 20s and it just kept getting better from there thanks to the level advantage it got from killing everything.
>>26711490You basically only need Water-, Ice-, and Ground-type moves to sweep most of the game in XY. Tyrantrum covered Vaporeon's weaknesses nicely. Also, Greninja doesn't have a very good level-up learnset. It basically gets STABs and Extrasensory.