We don't see the Dragons leaving the body of the Dragon Slayers except in Natsu's case, even though Igneel mentioned it in Episode 89. Why is that? Did they forget to animate it?
[Edit- Note :If they have not mentioned it in manga then wouldn't that will be a plot hole because everybody will be aware of the dragons leaving the dragon slayers body and no one would have been surprised to see the face getting destroyed at that time. Also fighting Achnologia would have been much easier.]
As far as I know, all Dragons of 1st and 3rd generations Dragon Slayers had shown themselves in the anime. Igneel againts Acnologia, while the other 4 (Metallicana, Grandine, Weisslogia, Skiadrum) helped in destroying Face.
If I remember it correctly, I think it was showed between the last four episodes(86-90) of Fairy Tail (2014).
A link stating that their dragons help them - http://fairytail.wikia.com/wiki/Episode_263
However, his celebration is cut short as the Dragon King crashes down near them, the Fire Dragon King holding him down with one claw and encouraging the humans not to give up hope. The ones who help humanity in this dire predicament are none other than the guardian Dragons of Wendy, Rogue, Gajeel and Sting, the powerful beasts easily demolishing the seemingly indestructible pillars by flying through them at great speeds.
