Galarian Farfetch'd - Pokemon Sword and Shield Guide - IGN

Farfetch'd has two different forms - a Galarian Form, and a Kantonian Form. You'll only encounter the Galarian Farfetch'd in the Galar Region

HOW TO GET Galarian Farfetch'd in Pokémon Sword (version exclusive)

Galarian Farfetch'd (Rebel Clash 94) - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Sword and Shield guide: Where to get Galarian Farfetch'd and how to evolve to Sirfetch'd - Polygon

Galar Farfetch'd + SirFetch'd 100% GURANTEE Evolution Guide - Sword Exclusive (Pokemon Sword Shield)

Galarian Farfetch'd and Sirfetch'd - Origin of Species

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Galarian Farfetch'd - Location & Evolves

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How to Evolve Galarian Farfetch'd - Pokemon Sword and Shield Guide - IGN

Were Hints at Galarian Forms Hidden in Ultra Sun & Ultra Moon?

Pokémon Sword and Shield Farfetch'd evolution method: how to evolve Farfetch'd into Sirfetch'd explained