Its not a bad typing. I admit its another case of a flying type not able to abuse its resistance to fighting types but flying is beneficial to the dark typing. We also have not had a single bad dark/flying type every.
Murkrow, Awesome. Vullaby, Its not incredible but its pretty good, its mostly just overshadowed more then anything else. Honchkrow, Freaking amazing. Mandibuzz, only flaw with this pokemon is the fact that it does not have sky drop. Its built to sky drop and cannot. But its still a nice bulky bird. Maybe they will fix this problem with gen 6.
Also i do not want a legendary that has been done to death. We do not need more dragons in ubers. They all die roughly about the same ways, they all are pretty much designed to just hit hard and take moderate damage unless its hit by a weakness and dragons all have the same expansive move pools. I am done with dragons for now unless they give me a decent steel / dragon that makes use of how amazing that typing is defensively since dialga was built for offense and just sorta has the best defensive typing in the game as a perk.
Rotom Fan With an Air Balloon YO DOG i heard you like yo Rotom's High. So i gave it a balloon so it can be fly while he high while he way up in the sky! Dog!