So this may have been discussed in the last 100 pages but a quick cursory search didn't bring anything up...
Today, I'm kind of puzzled about Razor Wind. No, not who learns it or what it's meant to be. Just... the move itself. I'm kind of just baffled as to why it exists at all.
So, to explain, it's a 2-turn Flying move - oh, wait. It's Normal. Oh, that whole wind thing confused me. Ah, so it's one of those odd "should have been another type" Normal moves from Gen I that was retyped like Bite or Gust or Karate Chop or Sand-Attack? Oh, no, it's still Normal in Gen II onwards.
Hmmm. So the Japanese name comes from the concept of a mythical dust demon carried on the winds that would slice you with sharp claws and cut you to pieces. Interesting. Cool concept. Though kind of does still seem like a Flying concept? It's generally accepted that they weren't 100% about what Flying was in Gen I. Initially it appears that they equated Flying=avian creatures, before deciding to expand that to incorporate a broad concept of wind and air powers.
Anyway, back to the point. Okay, so Razor Wind is... a Normal move with awful accuracy and a significant drawback in the form of a charge turn with precisely no additional effects that would make using it worth it*, in a generation with a vast array of far, far superior Normal-type moves available via TM like Take Down, Mega Kick, Mega Punch, Double-Edge, Body Slam, Tri Attack... hell, even Skull Bash. And most Pokemon didn't even need the TMs - if you look at the movesets in RBGY, a large chunk of Pokemon learn almost nothing BUT Normal-type moves levelling up.
But here's the real odd thing. Hardly anything learns it. At least not naturally anyway. In Gen I, it's only accessible by TM. Fair enough, lots of things were back then. But then in Gen II, it's completely inaccessible unless you trade with Gen I. A couple of species learn it by breeding but you still have to have traded with Gen I for them to do so. Gen III gives it to two Pokemon (Nuzleaf and Absol) and each subsequent gen gave it to a couple more - usually Flying - Pokemon. It wasn't until Gen VI that it was really spread about and given to a large handful of new mons in that generation, again most of them Flying. Gen VII just gave it to Type:Null, which really is the perfect mon for it; it learns an absolutely random grab-bag of moves. Quite a lot of species do it by breeding admittedly, some which suit it (Spearow, Zangoose, Horsea, Gligar, Axew) and some whose connection is a little more opaque (Girafarig, Bulbasaur, Drampa) - though not, as someone did note earlier on, Sneasel, which would seem to be a perfect fit.
*What? I thought it had an increased critical-hit ratio? Nope. That's only in Gen II. Gen III inexplicably removed it (though at least fixing its godawful accuracy) and then Gen IV brought it back while making it a Special move - thereby making it even less valuable to Scyther, Absol, Gligar, and Zangoose than it was before.
If there was one move I'm glad Gen VIII euthanised, it's this one. I can't think of another move so thoroughly outclassed and disadvantageous.