Watch filler arcs only if you're desperate for more content material after you're done - they're pretty meh and frequently outstay their welcome (aside from the primary one, but that has a lots of other concerns such as figures performing fully ooc). How particularly does Pokémon have filler episodes? Essentially http://waylonzgmtx.blogminds.com/a-review-of-how-to-watch-fairy-tail-anime-without-fillers-709682