Speaking of Teams, Hitmontop is overrated in doubles. As if ... he's a so-so pokemon in singles. But once Double battles come to play, Hitmontop just suddenly becomes ... OU! Oh my gosh! Sudden tier shift?
While i will admit that Hitmontop isn't the hardest Pokemon to play around, I wouldn't say Hitmontop is overrated. Find another Pokemon in Doubles that offers as much support as Hitmontop? Intimidate, PLUS Fake Out support, PLUS offensive pressure with moves like Close Combat (often Fighting Gemmed), Sucker Punch (sometimes Dark Gemmed), Mach Punch, and sometimes the random Bullet Punch (note, not all of these are always on the same set) or Drain Punch (which would, honestly, be very wise as it aids Hitmontop's staying ability), and then you have Quick Guard (on a predicted Bullet Punch or Fake Out, allowing your partner to take out or get a free switch in to those Pokemon), Wide Guard (protecting from common moves like Rock Slide, Heat Wave, Blizzard, Icy Wind, Surf, Muddy Water, and, recently, Earthquake) and even Feint, lifting the common Protect off of Pokemon that otherwise would have been safe that turn. Let's also not forget its formidable bulk; when fully invested defensively, Hitmontop is a Pokemon that will take a beating, as well as its Speed, a middling speed tier, allowing it to serve on Trick Room teams (very common), Tailwind teams (fairly common), and standard Goodstuffs (extremely common).
With Intimidate allowing your party to focus on its Special Defense, you can EV your Pokemon to take common Dragon Gemmed Draco Meteors from LATIOS, of all Pokemon, and still survive to hopefully KO that Latios (particularly in the case of Pokemon like Garchomp, Hydreigon, etc.). The fact that it also CAN run an offensive set, or even a mix of the two, leaves Hitmontop to be a Pokemon that you need to be careful for; if you mispredict it, it can easily spell the downfall of your team.
That's not to say Hitmontop is infallible. 220 Sp.Attk Togekiss can OHKO the Standard Hitmontop (252 HP/252 Attk). Expert Belt or Life Orb 196 EV Reuniclus OHKOs the standard Hitmontop as well. Unintimidated Pokemon with Acrobatics easily KO Hitmontop too (although good luck tricking your opponent to leave Hitmontop in on Pokemon like Crobat, Meinshao, Gliscor, or Scizor). And anything with Hurricane will likely OHKO Hitmontop as well, although I haven't run the calcs so don't quote me. Defiant Braviary is also a fairly good check to Hitmontop, ignoring Intimidate, OHKOing with Brave Bird. Not to mention Hitmontop's not really doing anything to defensive Special Attackers like Gastrodon (unless Hitmontop's running an offensive set).
Hitmontop is not infallible, and standard Pokemon can beat it. But that doesn't make it overrated. Hitmontop does its job very well, and in the first place, nothing can do what Hitmontop does "better." You always have to give something up. Intimidate Gyarados can fill the intimidate support, offers Taunt and Thunder Wave, but you have to choose with Gyarados; do you want Bulk or do you want Offensive? It will always be lackluster in one aspect or the other. Mightyena offers Initimidate and Sucker Punch, but lets be honest. It's slow and frail enough to get OHKO'd by any neutral attack. Salamence exists, but it is not at all bulky, and it is weak to common Ice and Dragon type attacks, most of which are Specially based. And then there's Scrafty; good bulk, same attack stat, but slower. Facing other Hitmontop will result in either Scrafty getting Faked Out or its party getting Faked Out, leaving that first turn entirely to the mercy of your opponenet. Let's also not forget that it's weak to Fighting, a common offensive type common due to the prevalence of Pokemon like Terrakion and Tyranitar.
As for the support of Fake Out, Wide Guard, Quick Guard, and Feint? Only Hariyama and Meinshao. So why not Hariyama? Same reason as Scrafty, except without the bulk. Why not Meinshao? Mainly because it's frail, it's worse than Hariyama in terms of bulk.
Hitmontop is, however, outclassed offensively by a lot of Pokemon, but what it does bring to the table is what makes it valuable. Hitmontop is a great defensive pivot that is still capable of dishing out on the offense. Great ability, great stats and great support moves that allow it to serve on pretty much any team; how is it overrated?
Quick note: Before you start thinking that I'm like, one of those super competitive players trying to put you down, don't, haha. I am not super competitive, and I almost exclusively play Doubles. I'm not fond of standard mons, and I'm much less fond of standard teams, but I know a good Pokemon when I see it. Doesn't mean I'll use it, but I do see their advantages.
