Well everything u see is explained or shown it doesn't just appear out of nowhere like Idiot ID:OiKzEMVk said. Ichigo was traine dby the cat woman Yoruichi (watever the name is spelled) and then Shop owner make him do the 3day Bankai Training so thats how he learned Bankai from. did u even fucking watched the episodes before that? Bleach departed away a bit from the manga becuz the anime was catching up to it. They needed more time to wait for the manga to be printed to move on the plot. As of now 2007 July it folows exactly plotline as the manga only they r doing fillers becuz it caught on with the manga once again... That is why Naruto had fucking 3 seasons of fillers becuz they caught up with the manga way to fast n waited 3 season to fillers to do Shippuuden. Even then Shippuuden draws as much time as possible to give manga more time to continue the plot before catching up by making us wait 2 weeks per 30min episodes just to see fools doing few Bullshit moves to waste 30 fucking mins

There.. now all of u STFU for once becuz the anime is always on the damn time constraint becuz it was created during the serialization of the manga in the middle of its volumes.. and 1 episode = almost 1 volume of manga.. please STFU its all about time contraints thats why animes deviates from the plot to get more PLOT from the manga itself.. sometimes the manga is released is so damn slow the anime producers just decided that its just not enough material n scraps the project altogether.