Talk:Discord/@comment-25502720-20150416200410/@comment-4933828-20150517140242

Even though Discord is their "ally" it does not mean he will go around solving every single problem. We've already seen in season 5 episode 1 he doesn't necessarily know everything, and we can suppose that even if the mane six were completely disabled for an unknown amount of long time, only princess Celestia's encouragement would probably force Discord out to face out (and easily defeat) Starlight Glimmer.