Journeys isn't canon and here's why:
1. Pikachu would never try to run away because another Pokémon is getting more attention than him.
2. Ash didn't even mentioned Ambipom despite the fact she and Ash are now based in Vermilion.
3. Dawn not only didn't get a single new Pokémon, she also hasn't had a single evolution since Quilava. This is pretty unrealistic for a person who's travelled 3 regions on her own. Keep in mind she's been travelling on her own longer than Iris too (at least since Ash left), who is now a champion and fully evolved Axew.
4. The Pichu eggs in Johto and Journeys look extremely different.
5. Team Rocket barely even appear and when they do, they don't even use their own Pokémon anymore. Pretty unrealistic for people so caring about Mimikyu and Mareanie that they refused to let them go to Team Rocket HQ.
6. Goh caught Suicune.
7. Pretty sure in JN82 GMax Pikachu had a normal tail instead of the normal long one, meaning they can't even be consistent on what GMax forms look like. Same with the TCG.
8. Ash used Mega Evolution even though at one point they said Ash would never get a Pokémon that would Mega Evolve.
9. Barely any advertisement towards the new region, we haven't even seen most Gym Leaders...
10. Ash suddenly sucks at training more than he did in BW. He doesn't even bring a full team with him anymore and instead leaves all of his team minus Pikachu in offscreen land.
11. For a series that's meant to be a "conclusion" for Ash winning a league, he doesn't once thank all of his older Pokémon that got him this far. Of Ash's older Pokémon, we've only seen Infernape battle.
12. The tournament at the end of the series only has 8 competitors. Additionally, all battles are 3 vs. 3. No other region has had the finals be a 3 vs. 3 battle (I'm including Kukui in Alola), nor so few battles either. There has also been minimal build up towards it in the last year.
1. Pikachu would never try to run away because another Pokémon is getting more attention than him.
2. Ash didn't even mentioned Ambipom despite the fact she and Ash are now based in Vermilion.
3. Dawn not only didn't get a single new Pokémon, she also hasn't had a single evolution since Quilava. This is pretty unrealistic for a person who's travelled 3 regions on her own. Keep in mind she's been travelling on her own longer than Iris too (at least since Ash left), who is now a champion and fully evolved Axew.
4. The Pichu eggs in Johto and Journeys look extremely different.
5. Team Rocket barely even appear and when they do, they don't even use their own Pokémon anymore. Pretty unrealistic for people so caring about Mimikyu and Mareanie that they refused to let them go to Team Rocket HQ.
6. Goh caught Suicune.
7. Pretty sure in JN82 GMax Pikachu had a normal tail instead of the normal long one, meaning they can't even be consistent on what GMax forms look like. Same with the TCG.
8. Ash used Mega Evolution even though at one point they said Ash would never get a Pokémon that would Mega Evolve.
9. Barely any advertisement towards the new region, we haven't even seen most Gym Leaders...
10. Ash suddenly sucks at training more than he did in BW. He doesn't even bring a full team with him anymore and instead leaves all of his team minus Pikachu in offscreen land.
11. For a series that's meant to be a "conclusion" for Ash winning a league, he doesn't once thank all of his older Pokémon that got him this far. Of Ash's older Pokémon, we've only seen Infernape battle.
12. The tournament at the end of the series only has 8 competitors. Additionally, all battles are 3 vs. 3. No other region has had the finals be a 3 vs. 3 battle (I'm including Kukui in Alola), nor so few battles either. There has also been minimal build up towards it in the last year.