>>27458225Focus on getting one of each evolution line first, then you'll only having breeding mayhem left. Trading on the GTS speeds up the process immensely. Easiest thing to do is catch scythers in XY and farm metal coats. If you put a scizor or a scyther holding a metal coat on the GTS, it'll be gone for whatever you want, including catchable legendaries, within minutes. Also, never try to find something on the GTS; always post something yourself and wait for it to get traded while you're out catching/breeding. For fast leveling, use ORAS. Use the Blissey bases and lucky eggs.
If you own any two games from XY and ORAS, you can use the GTS to trade with yourself (extremely useful for trade evos). Just post something worthless on the GTS and ask for the specific thing you want to trade. Then go into your other game and make the trade. Always make sure to put the usless mon on the GTS and not the one your trying to really trade so that you don't lose anything if someone makes the trade before you can get to it.