Step 1: Get an Applin
Applin can be found in the Apple Hills area of Kitakami. To get to Apple Hills, head west from Mossui Town. Applin is disguised as an apple in the trees, so you need to run into the trees to get them out.
Step 2: Get a Syrupy Apple
The Syrupy Apple is an item that is exclusively available from a vendor in the Mossfell Confluence zone of Kitakami. The Syrupy Apple costs 500 Poké Dollars.
Step 3: Evolve Applin into Dipplin
To evolve Applin into Dipplin, give it the Syrupy Apple. You can do this by opening your bag and selecting the Syrupy Apple. Then, select Applin and choose “Evolve.”
Step 4: Enjoy your new Dipplin!
Dippin is a Grass/Dragon-type Pokémon. It is a good choice for players who are looking for a Pokémon that is strong against Fire, Water, and Electric-type Pokémon.
Bonus tip: If you have a shiny Applin, you can evolve it into a shiny Dipplin.
Conclusion
This is a quick guide on how to get Dipplin in Pokémon Scarlet and Violet: The Teal Mask. I hope this helps!