Sorry for the double-post, but I had an idea.
Thoughts on factoring in Secrets of the Jungle/Koko and any other movies released during Gen 8's lifespan? They are part of the anime continuity by virtue of Ash existing, and it may very well be our only prominent sight of Pokemon like Zarude in animated media. What do you think, should I do it?
I say keep a separate list, just because i'd be interested in what appeared in the series proper.
I could see Zarude showing up in the anime at some point, though. Magearna, Marshadow and Zeraora all did and, hey, Zarude does briefly show up in the new opening when not every mythical did.
e: Looking through all the mythics in the main series...
Mew: Obviously, kind of important
Celebi: I feel like this thing had like 3 separate fillers around it
Jirachi: A BW episode that I do not remember at
all
Deoxys: Had a random filler in DP where everyone got separated, in addition to the 2-part Ranger episodes in AG
Phione: Had an episode in DP
Manaphy: Showed up in some fantasies in a SM episode, plus the weird world of pokemon thing they did for the recent Mewtwo episode if we want to count that. ...kind of feels like a POkemon that'd have its own episode at some point.
Darkrai: The Cresselia vs Darkrai episode in DP and, of course...Tobias.
Shaymin: The Marley episode
Arceus: Never appeared in the anime, though the red chains surrounding Dialga/Palkia do resemble Arceus' mandala
Victini: Never appeared in the anime
Keldeo: Never appeared in the anime
Meloetta: Had an entire arc devoted to it
Genesect: The Genesect Army showed up in a flashback sequence when N stumbls on the lab they broke out of.
Diancie: Never appeared in the anime.
Hoopa: Only made an appearence in the same world of Pokemon thing Manaphy did.
Volcanion: Never appeared in the anime
Magearna: Had a subplot in the SM anime
Marshadow: Showed up briefly in a Rotomdex episode where it got lost and couldnt Identify it
Zeraora: The Dia Episodes in SM
Meltan, Melmetal: ASh literally owns them.
Feels like more often than not, mythics show up in the anime at some point.