The Pokemon anime always has a way to Link the current generation to the next generation. It's been like that since the very first series:
Gen 1 to Gen 2:
-Ho-Oh
-Togepi
-Snubull
-Elekid
-Marril
All of them appeared before Gen 2 started.
Gen 2 to Gen 3:
-Blaziken in the Johto League finals
-Misty's Azurril
Gen 3 to Gen 4:
-Lucario
-Munchlax
-Weavile
-Mime Jr.
-Bonsly
-Manaphy
-Mantine
-Buizel
-Chatot
All of them appeared in the Lucario and Manaphy movie.
Gen 4 to Gen 5:
-Zorua and Zoroark movie
Gen 5 to Gen 6:
-Helioptile
-Gogoat
-Noivern
All of them appearing in the Final Episode of Best Wishes.
Gen 6 to Gen 7:
-Magearna in the Volcanion movie
Now, I never watched the Sun and Moon anime but I'm watching the current one. My question is, what exactly linked Alola with Galar before Gen 8 started?
Gen 1 to Gen 2:
-Ho-Oh
-Togepi
-Snubull
-Elekid
-Marril
All of them appeared before Gen 2 started.
Gen 2 to Gen 3:
-Blaziken in the Johto League finals
-Misty's Azurril
Gen 3 to Gen 4:
-Lucario
-Munchlax
-Weavile
-Mime Jr.
-Bonsly
-Manaphy
-Mantine
-Buizel
-Chatot
All of them appeared in the Lucario and Manaphy movie.
Gen 4 to Gen 5:
-Zorua and Zoroark movie
Gen 5 to Gen 6:
-Helioptile
-Gogoat
-Noivern
All of them appearing in the Final Episode of Best Wishes.
Gen 6 to Gen 7:
-Magearna in the Volcanion movie
Now, I never watched the Sun and Moon anime but I'm watching the current one. My question is, what exactly linked Alola with Galar before Gen 8 started?