Ash getting the Egg was a last minute thing to end off the episode. I never saw that coming, but those last two minutes were the only major part of the story line. Compared to the rest of the entire episode, I wouldn't really care if this is filler or not. It's an episode, so woot.
And to the one who said the grandmother looked like a guy, omg, I thought so too! Back when that character was leaked in a episode preview screen shot. Up till the teacher said grandmother was when I thought she was a man.