Hclegend: What I meant was that if we ban Iron Defense on Scolipede (for example) next thing you know people will be asking why we don't ban Dark Void on Darkray and allow it in OU because without it he is not broken (also Seed Flare is what makes Skymin broken if he was to drop to OU, the major chance of dropping 2 stages of SP Defense is the main problem here).
WebBowser: Saw your reasoning and I don't agree because I feel like outside of Full BP he is by no means broken, the problem of Scolipede in BP is that in the right circunstance he passes +2 defenses and +2 speed to something that can increase it's special defense and special attack, have a STAB move of over 200 BP, is immune to status moves, taunt and phasing outside of Dragon Tail, and can Pass again if facing a counter. Scolipede passing speed and something else (be it attack or defense) to something like Mega Heracross is a competitive, viable and non-broken strategy, the broken thing happens when he passes his boosts to Espeon, and even so it is only a problem because Espeon can then pass to the very bulk passers Vaporeon and Sylveon.
I am not disputing that passing +2 defense and +1/2 speed to espeon is broken. In fact, as you have stated, passing +2 defense and +1/2 speed to espeon is much more broken then most recipients. I am in full agreement with you.
However, just because one recipient happens to be more broken then other recipients does not make other recipients not broken. I am quite sure that passing speed and defense to Kyogre would be far more broken then passing speed and defense to espeon, due simply to the sheer immediate power water spout provides and Kyogre's inherit bulk. That does not make passing to espeon not broken.
Likewise, just because passing speed and defense to espeon is more broken then most other receivers does not make other receivers not broken.
Furthermore, it is not only the support that scolipede provides that is broken, but the reliability in which he does so. Many mons become very powerful, even broken if given a shell pass, yet shell pass is not broken in OU. Why is this? Because the only two users of shell pass cannot shell pass with anything resembling reliability, meaning that if an opponent pulls off a shell pass, the player has screwed up, and we (as in, the competitive community in general) are ok with that. Scolipede, on the other hand, can setup iron defense and speed against a huge variety of the OU metagame, against offensive and defensive threats alike, and can only be stopped by a choice few mons like talonflame and phase leads. Offensive teams in particular are screwed over by scolipede because precious few offensive mons can ohko after an iron defense and even fewer can do so while outspeeding scoli at +1. It is a combination of the reliability as well as the magnitude of support that makes scolipede broken.
For comparison, let us take ninjask. Ninjask can do his job just as reliably as scolipede, which is pass speed. However, speed alone is not usually enough to break a mon as that mon is still vulnerable to being revenged through priority or by mons who can take the hit and ohko back. Scolipede, when successful, quite nearly removes priority from the table because at +2, even the most powerful priority will struggle to revenge any decent OU threat. It also removes most physical attacks from the table because most receivers are semi bulky mons with a middling to low speed tier, meaning they already have a non negligible defense stat that just got doubled. For a base comparison, Phys defensive scolipede has physical bulk akin to that of phys defensive
deoxys-defense! Scolipede has mediocre defensive stats at best. Now lets give that same boost to a mon with non laughable bulk such as azumaril or gyarados. Scared yet?. Now lets up the anti again by giving it to a mon with good natural special bulk like sylveon or AV anything, and you have a nearly unkillable mon, ready to smack you in the face repeatedly if you lack a phaser. Do you now realize what scolipede does to offensive teams? There is no way ninjask could give his team this kind of support, so even though ninjask can do his thing just as reliably as scolipede, ninjask is not broken, scolipede is, because scolipede supports his team much better.
TL;DR Scolipede is not broken just for being reliable nor is he broken just for the level of support he brings to his team. He is broken due to being
too reliable for the
level of support he brings to his team.
Let me know if you find anything amiss with my argument. If you can, please elaborate why you believe quick pass scolipede to not be broken.
P.S. awesome user name btw :)