I told people I wouldn't be online today but this is forcing my hand.
Dude I'm mostly on the Battle Spot Doubles on ORAS. The win streak was on there. Before you ask, no, I couldn't use a camera since I have no webcam or camera with an SD card.
This isn't the Battle Spot forum,
and by "before the reset" I assume you mean season 7, meaning that a) there's no way you can prove your win streak (unless NOVED is right and I suck at using the PGL website) and b) you haven't been doing so well in season 8.
EDIT: it seems I cannot read
I don't always use Pokemon Showdown because of the fact it is sometimes inaccurate.
I can assure you that PS is accurate in all aspects except a select few ability-move interactions that do not affect your strategy (aside from minor glitches that are fixed promptly).
And yes, Taunt fucks this over, and the win streak was mostly flukes and insane luck. Some did come down to skill though.
"This strategy got lucky" doesn't mean "this strategy is good."
As you said, the ladder [in general] is bad.
Battle Spot on cart is probably hundreds of times more competitive than Battle Spot on PS, so unless you're referring to PS I don't know what you're talking about.
Also, some of the wins did have Regigigas KO'd, only to get massacred by the rest. The win streak wasn't just Regigigas and Pyroar on their own, solo-ing teams for days.
This would be defined as "building an otherwise good team" and is in no way related to Regigigas (other than you picking the Pokemon that work best against what the opponent brings).
Intimidate only takes down the attack a small bit.
If your opponent leads with Mega Kangaskhan and an Intimidate partner (Landorus-T often carries Superpower) this happens:
-1 252+ Atk Slow Start Regigigas Drain Punch vs. 4 HP / 0 Def Mega Kangaskhan: 38-46 (20.9 - 25.4%)
-1 252+ Atk Slow Start Regigigas Ice Punch vs. 4 HP / 0 Def Landorus-T: 84-100 (50.9 - 60.6%)
If Landorus-T activates your Weakness Policy with Superpower it can be OHKOed by Ice Punch, but you still barely break 50% on Mega Kangaskhan, and Return will finish off Regigigas and now you have a Pyroar that's nothing but a Helping Hand bot (that is going to be outsped by Jolly Kang because you're running Modest).
Helping Hand outweighs it, and if Regigigas is using EQ or Drain Punch, he can kill Pyroar to get a Moxie Boost, but if it's the latter, more health as well. Like I said, Regigigas kills his own allies.
Cool, Pyroar's dead and Regigigas got a boost! Regigigas is now in KO range, you're slow as balls, and your opponent's Pokemon are probably still healthy because all of your attacks are 75 BP.
On top of that, I know Return is good, but this Regigigas is an attacking variant of the normal stallmon (Hence Dizzy Punch - parafuse). If you think it's better, go nuts and use Return.
There is no use for Thunder Punch. Neutral Return has more BP than super effective Thunder Punch (153 vs 150) and anything hit harder by the latter is also hit super effective by either Ice Punch or Drain Punch (or is a Ghost and burns you).
I understand how Regigigas is near-outclassed by Kang, but if you don't wanna take up a mega slot, Regigigas can be a nice choice depending on how it's used.
Regigigas has a niche as the bulkiest user of Wide Guard in the entire game - that's right, eat your heart out Aegislash - while also packing a couple other nice support moves like Thunder Wave. To use Regigigas (and, while we're at it, Slaking) offensively requires dedicating another Pokemon to supporting it, meaning that said other Pokemon is essentially wasted on something that can provide much more than "Helping Hand bot" even if you do get the combo off. If one part of the combo fails, you essentially brought two deadweight Pokemon into battle. This is the problem with almost all ability-based gimmicks: if the strategy is to work, it has to work
perfectly, or the entire battle can be lost in a single turn. Getting your Entrainment redirected turn 1 by a Clefable or Amoonguss or stopped by Fake Out or Taunt means your opponent can take a chunk out of Regigigas's HP with something else and put it in or near KO range shortly.
By the way, be a little nicer. No wonder this thread and the whole forum goes dead a lot. I understand you may think I'm wrong, but offending people isn't the way to go. I see the camouflaged offenses everywhere.
I already said this. It's a well known fact that Stratos is a bully, but he's right this time.
If you still think this strategy is good, feel free to challenge me on Pokemon Showdown (or on cart if you're so dedicated) to a battle. While I can't guarantee I'll win (I won't claim I'm the best battler around), I know a thing or two about stopping gimmicks ;)