Farfetch'd's got good HP and fairly balanced overall stats, but unlike many other Flying Pokemon it can't evolve.

Does Ash's Farfetch D evolve?

Farfetch'd was a Pokémon in the Galar Region that was challenging trainers to battle until Ash caught him and eventually evolved into Sirfetch'd.

What challenge does Farfetch D evolve?

Once trainers have caught a Galarian Farfetch'd you want to evolve to Sirfetch'd, they'll have to make it their buddy similar to Galarian Slowpoke. Instead of catching a specific type of Pokemon, trainers will need to make 10 Excellent Throws and then feed Farfetch'd 50 of its candy.