It is a very stabby duck.
Yeah, I don’t know… I think it was very unlikely that any hypothetical Farfetch’d evolution could possibly stick the landing, given how long it’s been anticipated, but this is not bad. Farfetch’d’s “leek” is actually a spring onion, which is a more common vegetable in East Asian cuisine, whereas Sirfetch’d seems to have an actual leek, which is a nice touch, given that leeks are an emblem of Wales. The “shield” also seems to be made of leek leaves, and that’s quite nice. If Sirfetch’d is supposed to be based on any specific type of wild duck native to Britain, then I can’t find it (though I’m admittedly no birdwatcher). Ducks live on lakes, and I remember some minor legend from Britain about some local folk hero who received a magic sword from a lake, but as connections go this one’s a bit of a stretch for me. Besides, Sirfetch’d’s leek is more like a lance than a sword, and it seems to wield it like a lance in its animations. A lance is a bit of a rubbish weapon if you aren’t mounted, but it’s a Farfetch’d evolution, so I suppose we can’t make life too easy for it. The fact that Sirfetch’d is apparently exclusive to Sword version makes me wonder if there could possibly be a split evolution, with the other form being exclusive to Shield version (à la Lycanroc); otherwise, there’s a good chance its counterpart is some other older-generation Pokémon, probably single-stage until now, with an evolution unique to Galar. Unclear to me why Sirfetch’d isn’t a Flying-type, but then, I have a fairly long history of thinking that the Flying type makes no damn sense anyway.