And you question my credibility? I have been using Baton Pass since 4th gen up to now for at least a few hundred games. How can you even discuss something you've never used, now that's something that makes me wonder.
Either way Spikes Brave Bird Skarmory is standard? What else would you be using, especially on Stall? Mandibuzz is by far the better Defogger for Stall anyways, and Heatran is the better SR user. I don't even.
Also, if you force out Scolipede you can either setup Spikes if you get a favorable matchup, or if you don't you just switch out accordingly. Mega Venusaur manhandles all the pokemon you mentioned by itself. That sounds reasonable enough to me. The predictions are in favor of the Stall user because Espeon cannot do anything to Skarm without significant boosts, which it can't obtain without perfect prediction on the BP users end and even then. Espeon has no form of recovery barring Lefties; it can't freely come in on Skarm over and over, and passing out everytime against Skarm is practically impossible with the threat of Whirlwind.
Anyways this is just turning into a one person vs everyone contest which I'm not really interested in. If you bring up some some solid arguments for once then I'll continue to reply, but I consider you questioning my integrity (even though you don't even know me which is even more questionable) as ad hominem so I don't really feel like arguing with you.
0 Atk Skarmory Brave Bird vs. +2 240 HP / 80 Def Scolipede: 110-132 (34.2 - 41.1%) -- guaranteed 3HKO
0 Atk Skarmory Brave Bird vs. +4 240 HP / 80 Def Scolipede: 74-90 (23 - 28%) -- 69.7% chance to 4HKO
0 Atk Skarmory Brave Bird vs. +6 240 HP / 80 Def Scolipede: 56-68 (17.4 - 21.1%) -- possible 5HKO
Taking these calcs into account, I think it is rather predictable what Skarmory will be doing. If, for some reason, maybe lack of experience, you decide to lead Skarmory and BB Scolipede while it uses Iron Defense, I am pretty sure that no veteran player would have to come and tell you that you are wasting your time trying to kill it and you should try phazing or setting up instead. Regardless of which of the two options you choose, your opponent will probably go to Espeon unless they, for some other reason, think that you have no idea what you are doing. In that case, this calc becomes relevant:
0 Atk Skarmory Brave Bird vs. +2 200 HP / 0 Def Espeon: 82-97 (25.5 - 30.2%) -- 0.4% chance to 4HKO after Leftovers recovery
Now, you can either just keep spamming BB for some reason, assuming you haven't been phazed, or you switch out to something more useful. The options: Chansey and Haze Quagsire, assuming you have the latter. In the case of Chansey, you'd probably just be spamming Seismic Toss, which is essentially screaming set-up fodder. As for Haze Quagsire, I am pretty sure reading any five consecutive pages of this thread will probably give you enough knowledge about the general opinion.
However, let's do as you say and spam BB on Espeon because it has no recovery. Let's assume you've been getting lucky and are probably going to 4HKO. Your opponent only has 2 turns to use CM before needing to try and take you out or switch. That is, of course, assuming that your BB recoil is being covered by Lefties, which it could be, but it isn't relevant enough to check. So you are spamming BP for two turns and your opponent is using CM for two turns, putting them at 0/+2/+2/+2/+1.
+2 0 SpA Espeon Stored Power (160 BP) vs. 252 HP / 0 SpD Skarmory: 288-340 (86.2 - 101.7%) -- 12.5% chance to OHKO
Game over for Skarmory. However, let's assume they get scared and don't want to take on Skarmory with Espeon for whatever reason, maybe you ignored the futility of BBing a boosted Scolipede and hit Espeon on the switch. What are the options? Vaporeon will get phazed, Zapdos/Mr. Mime will get phazed, Sylveon will get phazed, Scolipede will get phazed. So, only Smeargle stands a chance. Let's assume you have one layer of Spikes somehow, breaking Smeargle's Sash. Does it even matter though?
0 Atk Skarmory Brave Bird vs. +2 88 HP / 168 Def Smeargle: 85-102 (31.1 - 37.3%) -- 79.4% chance to 3HKO
Not really, you'll just get Spored before you can kill it. Okay, well that is where Mega Venu joins the game. It can soak up Spore, so there should be no problem, right? Well, let's consider what just happened. Smeargle comes in, takes a BB, uses Ingrain. What do you do that turn? Let's say you predict the Ingrain and go for a second BB. Then, you switch to Venu as it Spores. Then what? Well, seeing how Espeon could safely set up 2 CM at least before chickening out, we can assume Smeargle is at +2. It BPs back to Espeon as you Sludge Bomb.
0 SpA Mega Venusaur Sludge Bomb vs. +2 200 HP / 252 SpD Espeon: 48-57 (14.9 - 17.7%) -- possible 9HKO after Leftovers recovery
Unless you poison right off the bat, Espeon just uses Substitute and sets up all over you. Bring in Skarmory and it can just 2HKO assuming your Sturdy is intact. Seeing how it is common knowledge that every other part of stall apart from Haze Quagsire is setup fodder, I'm pretty sure we can see that Skarmory and Mega Venu together do very little if anything significant. We even made the assumptions that you predicted amazingly well, your opponent was blind to calcs and your opponent Ingrained before Sporing. So, unless you have Haze Quagsire on your stall team as well, Skarmory/Mega Venu don't put much pressure on BP teams. If you do have Haze Quagsire, then you could be running Weedles and you'd do just as well as your Skarm/Venu + Haze Quagsire team. Okay, ya, overexaggeration, but you get the point.
Now, for the main reason I felt compelled to comment.
Ad Hominem does not refer to people using some characteristic of yours to invalidate your argument, it refers to people bringing up an
irrelevant characteristic to invalidate your argument. I'm pretty sure that your experience with BP is more than relevant, making your finger-pointing and your attempt to downplay the importance of experience incorrect. As for the people saying, "I've been playing BP since I was in diapers" or something to that effect, nobody cares. It doesn't matter. There is a reason BP is this big of a problem as opposed to Gen <6.