Hi everyone, I'm a returning player looking to get started with the XY metagame.
I read the post on Blaziken's ban from OU, and it seems like the entire argument hinges upon Speed Boost. So why not just ban Speed Boost Blaziken specifically? Without it Blaziken is merely a good pokemon and not a broken one, and Smogon has done "complex bans" in the past (Drizzle + Swift Swim, etc.)
Complex bans have been used, but only when there is no better option, as they are a slippery slope, and a poor precedent to set for the metagame. For example, despite the need for banning the Drizzle/Swift Swim combination, doing so has produced hundreds of posts saying "see, complex bans are good! This is exactly what we mean by it being a bad precedent. Complex bans are not a good solution, and I'll outline why in the three basic rules below.
Rule One: Never make a complex ban when a simple one will do. There was no simple ban solution possible for Swift Swim + Drizzle. Banning just Swift Swim would have essentially banned outright a number of Pokémon who had no other viable Ability options, and which were only broken in rain. Banning just Drizzle would have massively unbalanced the weather wars.
Rule Two: Do not make a complex ban unless it affects multiple Pokémon. If there was only one Pokémon that could use Swift Swim + Drizzle or Sand Veil effectively, that one Pokémon would have been banned instead of the combination. Speed Boost itself is not broken. Banning it would ban Ninjask and Scolopede, both of whom use it legitimately. This also helps avoid unnecessary complex bans, and leads into the third rule.
Rule Three: Do not make complex bans to keep a Pokémon OU. If you are banning a Pokémon, it is on the basis of its best ability. Sure, that Pokémon might be useless if it's run with only three moves or controlled by an unskilled player (such as myself). So what? This is a game of mathematics and metagame refinement (especially here at Smogon). Each Pokémon is taken to its pinnacle when determining sets and viability. Otherwise, we have a nasty precedent for things like "Deoxys-A is allowed in OU as long as it only carries two moves". If a Pokémon's best set is overpowered, that Pokémon is overpowered, and banned. We don't cripple it or remove its tools to keep it OU unless the
tool itself is broken.
In short, Speed Boost is not broken, it is Speed Boost combined with Blaziken's stats, movepool, typing, etcetera. Banning Speed Boost would cripple otherwise decent Pokémon, and set a bad precedent for keeping Pokémon in OU that should not be there. Plus, all you would get out of it is a Pokémon who, without Speed Boost, is UU or RU at best, as Blaziken is otherwise not that impressive.