Verde Coeden Scalesworth
Ah, okay. Well in doubt that in general hadokens, rising anti airs, and rushdowns are common. But I don't see how that's problematic, especially to Megaman, who yeah, has those characteristics, but most 2D fighting game characters have at least two of those available to them anyway. You said it yourself, if the trope is not even talking about literal clones anyway, then what's the big deal? Pretty much every fighting game character ever has certain moves shared with another that isn't even a clone. Rising anti airs, projectiles, and rushdowns are all extremely common in 2D fighters, in fact most characters have have at least 2 of these, to be honest.
To say the least, that was the point of the trope. It just shares the name with the fighting archtype since it always uses two moves from the archtype in general(or 3, and sometimes the 4th point, being a jack of all stats. This was Mario before he changed it up a lot more in Brawl. But in Melee and 64, he pretty much had all 3 key moves).
Remember, it's not Hadokens, it's Fireballs. It's pretty much the "key projectile". Just the same reason why the rising attack is often called a Dragon Punch as a more general term, since it helps people realize that the punch variant is used outside of Street Fighter in general. Some games do still keep it as a Shoryuken, of course. The rushdowns are the least common, respectively, but that's because it's evolved as a move to either be its own combo attack or a combo creator. It's safe to say it's more varied than the other two, which for the most part tend to just have that projectile that goes far(but may or may not bounce, and so on), and the anti-air is clearly most famous in its Shoryuken form(the Dragon Punch), but we know it varies anyway. Shao Kahn uses one just like than in Mortal Kombat, a high shoulder rush move that brings him into the air at an upwards angle. Clearly not a dragon punch. He actually is kind of a strange one since he has all 3 moves, but is a super heavy hard hitter so barely has anything of the archtype other than the 3 special moves(fireball, anti-air, rushdown attack).
To be clear, you didn't understand what I was referring to when I said a shotoclone and why MegaMan is treated as one by some. All I was doing was explaining why he fits that particular trope definition. It started as that. But as I said, agreeing to disagree is fine. I believe he barely fits it, you don't. Nothing wrong with that. Mind you, it was clear that my point was that MegaMan's shoto moves options apparently were a problem on him, but it didn't matter if other moveset clones/shotoclones showed up... because they're not MegaMan himself. But that wasn't all of my point anyway. As I noted, the consistency in how he added the MegaMan characters didn't add up. If you say you have one slot for a MegaMan series character, you should stick to it. If you don't, which alone is fine on its own, why would you still cut a character that is a major top fan favorite that people heavily wanted to keep in? This is why I felt that the exclusion of him from 3 was poorly done. Making this decision right after you cancelled MegaMan Legends 3 was a kick in the teeth to many fans. Now, it's just bad timing, and at the very least, MegaMan(in his boxart glory) was in another game, but some didn't like that cause well, he was an ugly humanoid. Keep in mind my opinion is based upon the total actions. There's some indication that MegaMan himself didn't appear to be super popular enough to get back in like Tron did, but nothing really cited that. There's apparently a case that MegaMan X himself on the other hand topped a fanpoll, but the tropes pages clearly didn't cite it either, so I took it with a grain of salt. Plus, like you said, Zero is definitely the most popular of the X-series characters. Also, notably, Irafune wanted him as the main character of the series. He left before MvC3 came out(although I don't know if he left before it started development). It's funny that it's Capcom that pushed Zero as the de facto MegaMan X series character, not his creator who wanted that.