banning only a part of a pokemon doesnt work, because while its those factors, unless that factor breaks EVERY pokemon that has that factor (ie Moody), then that pokemon is the only broken thing.
sure blaziken without sb isnt broken, but you cant say speed boost is broken, because look at yanmega, ninjask, and sharpedo (all of which in ru and not anywhere near broken in UU).
This is exactly what I debunked in my previous post.
I'd make a picture but I'll settle for this:
Speed Boost + Blaziken: Broken
Speed Boost + Any other SB Poke (Ninjask, Yanmega, Sharpedo): Not Broken
Blaziken + Any other ability it currently gets (Blaze): Not Broken
Neither Speed Boost
nor Blaziken are broken. They are both merely good. It is their combination/synergy that is broken. We know from experience that Blaze Blaziken was inferior to Blaze Infernape in Gen. 4. That's not explicitly true in Gen. 5 but I don't think anyone can prove that Blaziken got such a boost from HJK and it's new toys that simply outclasses Ape in every which way possible (which is false: Ape has Priority, Ken does not).
I think regulating by abilities is fine as there is precedent for it (Moody Ban Drizzle+SwSw) , and there are at most 3 abilities any given Pokemon has. Regulating by moves is generally ridiculous, although not unheard of: Evasion and OHKO clauses. The way you're speaking of Manaphy though is not the same as these clauses and isn't a good example. How many other Pokemon have Hydration + Tail Glow + Rest + 100/100/100 defenses? On top of that, Manaphy doesn't have a second ability while Blaziken DOES.
@Woodchuck: The complication is only partially true. The upper tiers are easier (where less things are banned) and the lower tiers (where a lot of things can't make it because of usage stats, meaning you avoid the need to make some of them). You're only going to need to address overwhelming combinations for bans, but I think if you really wanted to tier AND ability, it'd be quite easy to do. I think the computer could easily keep track of the amount of time a Pokemon is used with a certain ability although I can't confirm it. It seems easy if you can block someone from using ability/move combinations for illegality, imo.
@soul_survivor: It doesn't matter if "no one is going to use Force Excadrill". If Rush Excadrill is game-breaking kick it out. You shouldn't be making decisions on an all or nothing basis (hence the limit and semi-limit in YGO).
You can nerf something enough for it to still be managable without completely banning it.
Edit:
If the ability itself isn't broken, it's the Pokemon that's broken.
Someone explain to me where this logic comes from. I'm going to be a broken record by the end of the day (punt unintended). If the Pokemon is manageable without the ability, and the ability has also been given to other manageable pokemon, neither of them can be the problem. You have evidence that Blaziken is a manageable threat with Blaze and you have other Pokemon with Speed Boost who are manageable threats so it must be some combination of what the ability does and what the Pokemon does that's the problem.