Hydreigon is better than those 3 because it is not exclusively an offensive mon. Tbh, I don’t even think of Hydreigon as an offense first mon as more often than not you are choosing it to plug holes defensively. I disagree about splashability; every team could appreciate an answer to Heatran, Blace, and Bisharp.Ok I was waiting for this tbh, I expected pushback against that nom, but I stand by it. Like I said, I get the appeal of Hydreigon's useful speed tier and strong boosted attacks, however, I still feel like its a very on paper mon, that tends to struggle in practice more than the other A- mons. For starters, the extremely common hail is a terrible mu for hydreigon, as it essentially grants free entry to alolatales which can force it out and set aurora veil. I'll admit the mons I used in my example weren't the best, but there isn't much to compare it to in A-. I think its important to note that hydreigon lacks splashability, and you're often forced to build around it, since its utility outside of being a tran/blace switchin is somewhat lacking. Think of bulky qd volc being able to soft-check kyu, melm, rilla, kart, and weavile as well as threatening burns with flame body. Rilla provides invaluable terrain support as well as an amazing rkilling tool, and dnite beats grass spam along with an excellent rain mu. Hydreigon can also find it difficult to find entry vs voltturn spamming cores, since it takes significant damage from even weaker uturns without defensive investment. You do make a good point about its useful speed tier, but if its running dark ground coverage it cant revenge the mons below it, like shifu, lele, and kyu (you've referred to its np set mostly in your post so I'm using it in my example). All this is not to say hydreigon is a bad mon, or that its not difficult to switch into, rather to say that it fits better in B+ alongside threatening, but flawed, offensive mons like Nidoking, Tapu Bulu, and Bisharp.