Celever
i am town
I remember an episode in Bill's place where Ash was comparing ancient drawings of the 3 kanto legendary birds with the Ho-oh he had seen, so I think it was brought up more than just the three episodes; they were just forgettable moments.Most people are content to say the Anime's only awful these days, or even just after gen 1 or 2, but honestly... the worst thing the anime done in my opinion was in the first episode.
Ho-oh's appearance. It annoys the fuck out of me.
Now not necessarily the episode itself; the way it does it is fine. It's more the fact that it's never brought up again. I mean... okay, there's that one scene in the Pokémon Center in the next episode (or was it the episode after? idk) where Ash tells Oak about it, but beyond that nothing. Come on, this is the thing that inspired Ash to be a trainer, and not only was it a Pokémon we'd never seen before, it was a Legendary we'd never seen before. You'd think they'd make some arc out of it; but when they get to Ecruteak in Gen 2... I think Ash might have mentioned it? But nothing else. It's so annoying.