Regarding Pokemon Journeys, I just wonder how they're going to address the big questions that rise from Goh's goal of catching one of every pokemon, namely that its seemingly impossible? Not only are more pokemon getting created for the games every few years, but in-universe some pokemon consist of only single individuals, at least one of which (Silvally) already has a trainer (to my recollection nothing has been said about multiple Type:Null being made in the anime, unlike the games). It'd make sense if Goh is excluding legendary and mythical pokemon, but Mew being his final goal makes this seem unlikely. Is he really planning to travel to other dimensions to locate Ultra Beasts? To wait for a Jirachi that happens to be awake and/or just keep its cocoon around? To somehow catch avatars of life, death, land, sea, etc. for no reason but to record them in his dex? The games have more justification than that, and they are a lot more suited to just the collecting for collecting's sake motivation.
Not to mention how getting all of even non-legendary pokemon would exceed the space and resources of Cerise labs, and its not like Goh has enough resources himself. The lab is one large building, not a massive ranch like Oak's. He could always start sending them to other labs so this is admittedly a lesser point.
And then of course there is the big question of "why" it even makes sense as a goal to have in-universe. It's not like Goh is seeking some title or reward, or that he learns anything in particular by catching pokemon (he claims to learn by catching them, but if he does learn anything it only comes later by studying them and that can be done without catching them too). His "future in the palm of my hand" motto/justification makes no sense as he never says what future he is talking about or how having all the pokemon will enable it.
This of course also ignores just how he is able to catch pokemon so well. If throwing the ball in a certain way ups the chances (something they have yet to actually say) then what is the mechanism behind it?
Unlike Ash's vague goal of becoming a Pokemon Master (which people seem to think in-universe is possible at least, albeit the show has yet to define just what a master even is), Goh's is very concrete at present, which also makes it much more unreasonable.