>>17115050Actually, I have something worse than Defog Gliscor.
Defog Crobat.
This entirely depends on what kind of Crobat you're looking at, but it's Defog which makes it such a pain.
Defog means that it needs to be taught the move in D/P, so it has to be bred in Gen 4. You probably want hidden ability as well, because it has more use than its normal ability (comparable to Frosslass, really)
Then depending on what you want:
If you want Brave Bird, it needs to be a bred zubat.
If you want Giga Drain as well, it /must/ learnt the move by TM in Gen IV, which may very well mean playing through Diamond or Pearl until you get surf (either that or playing through Heartgold/Soulsilver until you defeat Erika.)
If you want Super Fang, it's easiest to be taught this move via tutor in Gen V - as shards are easier to come by
The other main moves for Crobat (Taunt, Roost, and Toxic) are all normal TMs in Gen VI, however in gen V you had to use more shards or use another Gen VI TM
Thus, the worst possible scenario for breeding a crobat involves /restarting a game and playing it through to the point where you've obtained four badges/, breeding a zubat in HG/SS (thus without destiny knot or a 100% accurate everstone) and then you spend shards to top it off.