The Japanese PMD community is pretty based. They've got a whole wiki up filled to the brim with info, from levelup growths to full on data on Destiny Tower clears, from generic "top tiers" like Drifblim to absolute joke messes like Caterpie getting things done. Only problem is the language hurdle for most people.
https://wiki.grovyle.net/pokedun3/index.php?%E3%83%A9%E3%83%B3%E3%82%AF%E5%88%A5%E3%83%9D%E3%82%B1%E3%83%A2%E3%83%B3%E3%83%AA%E3%82%B9%E3%83%88http://kanae.5ch.net/test/read.cgi/poke/1409653242/?v=pcDon't pay attention to /vp/-based PMD stuff, nobody plays the games here
