Hitmontop to D-Rank.
To keep Hitmontop in the same rank with the likes of Cloyster is an insult. I have no idea where this came from. For starters, Hitmontop is a Donphan on the physical side. Pure fighting-type bring basically no useful resists, just a good offensive typing, but don't let that impress you. 95 Attack and useless HP stat give you nothing. 304 HP is the max you get out of it and Choice Band users like Garchomp and Terrakion still 2HKO you with max investment. TechniTop sucks as said a bunch of times in the past. Don't use it. It is completely outclassed by Breloom nowadays. Even Donphan is better. It has Ice Shard too and a strong STAB Earthquake. Technitop is forced out by Volcarona, Alakazam, Keldeo, and Politoed on the special side, all common and you know what? Let me just list: Outclassed, Bad Defenses, Oder Sleuth from Donphan = better, it outclasses it, forced out be every spinblocker (Chandelure detroys, Jellicent = Will-O-Wisp, Gengar is boss), and Donphan has much better moves and even Stealth Rock! TechniTop is a good combination, but there are better Mach Punch users, Pursuit, and Sucker Punch users too. Speaking of PursuitPunch, I actually think Skuntanks does that better and Fire Blast mimics Close Combat. People can agree or not, but this is my opinion.
I disagree. Hitmontop is a better spinner than Donphan, it's as simple as that. Donphan tries to do far too much at once, since people expect it to be able to revenge kill, be a physical wall, set up rocks, spin, and be a strong physical attacker with Earthquake. You can say Odor Sleuth on Donphan is better than Foresight, but that just isn't true, since Donphan has no room for it. It absolutely needs Earthquake, Rapid Spin, and Ice Shard, which leaves one slot, which most people fill with Stealth Rock. Using Odor Sleuth is useless on Donphan since Jellicent, Gengar, Frosslass, and Chandelure all beat it (Chandelure wins if Sturdy is broken, which it should be if you have to spin, unless you predict the switch and Earthquake). Gengar and Jellicent laugh at Donphan, and so does Frosslass, however rare it may be. At least Hitmontop can do serious damage to them once they've been hit by Foresight.
0 Atk Hitmontop Sucker Punch vs. 0 HP / 4 Def Gengar: 166-196 (63.6 - 75.09%) -- guaranteed 2HKO
Whereas
252 SpA Life Orb Gengar Shadow Ball vs. 252 HP / 4 SpD Hitmontop: 156-185 (51.31 - 60.85%) -- 90.63% chance to 2HKO
So Hitmontop will always beat Gengar. As for Jellicent:
0 Atk Hitmontop Close Combat vs. 252 HP / 36 Def Jellicent: 159-187 (39.35 - 46.28%) -- guaranteed 3HKO after Stealth Rock
0 SpA Jellicent Scald vs. 252 HP / 4 SpD Hitmontop: 69-82 (22.69 - 26.97%) -- possible 5HKO after Stealth Rock
So Hitmontop wins unless it gets burned, which is about the same as a coin flip (49% to not be burned after two Scalds). Donphan, meanwhile, can't touch Gengar with anything but Ice Shard or (lol) Head Smash, and is 2HKO'd by Shadow Ball. Scald is a 2HKO on Donphan, whereas Earthquake in only a 3HKO (and Jellicent is faster).
Plus, Intimidate is, in my opinion, a more useful ability than Sturdy, given that Hitmontop already has good special bulk. Personally I think they should be in the same tier, but at the same time, I think your reasons why are flawed.