Pokemon Y will be available for a long time. Atlus USA does fairly limited prints of its games. I'm not saying that you won't be able to pick up Etrian Odyssey six-plus months from now, but it might be better to get it first just in case. That's just what I do.
Romans 12:9: Love must be sincere. Hate what is evil; cling to what is good.
The question is, when can you get the other game? If it's only a couple months, then both should still be available. We all know pokemon will be available for a long time, but anything from atlus, not so much. I'm not sure if I'm going to get pokemon, I'll probably just wait until I have more info about it. But I am enjoying EOU, so I'd go with it.
It's free to play after you buy it. That's F2P genius. ~ Brutal_Felix FC: 5043-1666-5680 ACNL Town: Etria.