Non-Uber fully evolved Pokemon that get it...
Absol, Alakazam, Ampharos, Aromatisse, Audino, Aurorus, Azelf, Banette, Beheeyem, Bibarel, Blissey, Bronzong, Celebi, Chimecho, Claydol, Clefable, Cresselia, Dedenne, Delcatty, Drifblim, Druddigon, Dunsparce, Dusknoir, Eelektross, Electivire, Electrode, Emolga, Furfrou, Furret, Gallade, Galvantula, Gardevoir, Girafarig, Golurk, Gothitelle, Gourgeist, Grumpig, Heliolisk, Hydreigon, Illumise, Jirachi, Jolteon, Kecleon, Klinklang, Lanturn, Latias, Latios, Lopunny, Lunatone, Luxray, Magnezone, Manectric, Mawile, Meloetta, Meowstic, Mesprit, Mew, Minun, Mismagius, Mr. Mime, Musharna, Octillery, Pachirisu, Plusle, Porygon-Z, Raichu, Raikou, Raticate, Regice, Regirock, Registeel, Rotom, Sigilyph, Smeargle, Solrock, Stantler, Swoobat, Thundurus, Uxie, Victini, Volbeat, Wigglytuff, Zapdos, and Zebstrika.
Most of these aren't remotely credible Special Attackers by
OU standards, or aren't credible by OU standards at
all. The ones I can see actually being relevant are...
-Hydreigon. Maybe. Still slow, lacking priority, and quite vulnerable. Keep in mind this is a meta in which Fairy-typed Extreme Speed is going to be a thing. And of course GeoXern is a menace to you.
-Mew, as covered.
-Meloetta. Problematic typing and movepool though.
-Porygon-Z. Actually, I'm joking, because it's slow, can't be Scarfed or Specs, is vulnerable to priority...
-Raikou? Maybe?
-Thundurus. I'm not sure how big a deal this is when it already runs Nasty Plot.
-The Latis? Parental Bond is bad with Draco Meteor though.
-Jirachi? It
does credibly approximate Serene Grace... but I honestly think Ampharosite is probably a better deal for it, or maybe Charizardite X. Or Sablenite. A lot of things, really.
Same as with Charge Beam...
Aggron, Ambipom, Ampharos, Audino, Azelf, Azumarill, Barbaracle, Beartic, Bisharp, Blastoise, Blaziken, Blissey, Breloom, Cacturne, Charizard, Chesnaught, Clefable, Conkeldurr, Darmanitan, Delibird, Delphox, Diggersby, Dragonite, Druddigon, Dusknoir, Eelektross, Electivire, Emboar, Exploud, Feraligatr, Floatzel, Flygon, Furret, Gallade, Gengar, Golduck, Golem, Golurk, Gothitelle, Granbull, Grumpig, Hariyama, Hawlucha, Heatmor, Hitmonchan, Hitmonlee, Hypno, Illumise, Infernape, Jirachi, Jynx, Kangaskhan, Kecleon, Kricketune, Krookodile, Ledian, Lickilicky, Lopunny, Lucario, Ludicolo, Machamp, Magmortar, Marowak, Mawile, Medicham, Meloetta, Meowstic, Mesprit, Metagross, Mew, Mienshao, Miltank, Mr. Mime, Muk, Nidoking, Nidoqueen, Pangoro, Politoed, Poliwrath, Primeape, Quagsire, Rampardos, Regice, Regirock, Registeel, Reuniclus, Rhyperior, Sableye, Sawk, Sceptile, Scrafty, Seismitoad, Shiftry, Simipour, Simisage, Simisear, Slowking, Smeargle, Snorlax, Spinda, Sudowoodo, Swalot, Swampert, Throh, Toxicroak, Trevenant, Typhlosion, Tyranitar, Ursaring, Uxie, Victini, Volbeat, Watchog, Weavile, Wigglytuff, Zangoose
More variety than Charge Beam, anyway. But what might actually be threatening with it, and out-do Mega Kangaskhan
itself? That's an important point -you can still run regular Mega Kangaskhan, it isn't too much for Ubers, and it has an essentially perfect intersection of qualities. What, exactly, is actually scarier
and gets Power Up Punch, than Mega Kangaskhan itself?
-Barbaracle. Too slow without a Shell Smash, and why would you run Shell Smash alongside Power Up Punch on a Kangaskhanite variant?
-Bisharp. Definitely scary with Sucker Punch and all, but I don't see why it would even run Power Up Punch when it can try to abuse Defiant triggering, or just Swords Dance up. What, are you expecting Focus Sash in this?
-Dragonite. Probably more threatening running Pinsirite or Salamencite for Aerilate Extreme Speed.
-Mew again, I guess.
-Tyranitar? Maybe? Really slow and better off with Dragon Dance in all probability, honestly...
-Conkeldurr? It at least has priority and a
lot of power...
-Mawile. Oh wait, it would rather run Mawilite. Or better yet Medichamite!
-Victini. You've already admitted it's a bad example, and yet it outclasses
tons of the things that get Power Up Punch at all.
-Jirachi again, and again I find it questionable.
-... Snorlax? It might make more sense than its Belly Drum set... but it competes with Mega Kangaskhan itself. Yeah, more bulk, but also way slower and with no priority.
-Infernape? It's faster than Kangaskhan, hits harder, has priority, and its typing is an excellent offense typing. It's also more fragile, and Giratina seriously just laughs at it, so maybe not.
... that's all I'm coming up with. I might be underestimating Weavile though.
---
Don't assume everything is mini-Mega Kangaskhan in
every respect. They aren't. Assuming they are is baseless and ridiculous. Mega Kangaskhan has an excellent combination of power, Speed tier (And remember: this is an Ubers meta and it's
not too much for Ubers), and moveset, and even has utility out of its base species letting it hit on Ghosts that can give its Mega form trouble. Parental Bond =/= the reason it's broken in OU. It's one part of a complete picture, and other Pokemon just do
not replicate the whole thing -let alone do so in such a way that they overwhelm the meta completely.
That's an extremely good point and pins down exactly why it bothers me that Mewtonite X is Suspected already.