Introduction to speed control in doubles
In VGC doubles, who moves first decides a huge part of the battle: an OHKO that lands before the opponent attacks is worth more than double the damage landing late. That's why almost every competitive team carries some speed control tool.
The two philosophies: fast or Trick Room
A "fast" team aims to naturally outspeed the opponent, or does so with Tailwind (which doubles your side's speed for a few turns). Works best when your attackers are already naturally fast.
A Trick Room team flips speed order for a few turns, letting slow but very strong Pokémon hit first. Works best with high-attack, low-speed Pokémon that would otherwise always be too slow.
Ways to slow the opponent down
Paralysis: lowers effective speed and adds a chance the opponent doesn't move that turn at all.
Moves like Icy Wind or Electroweb drop the target's speed a stage and deal damage to both opposing Pokémon in doubles — "free" speed control bundled with an offensive play.
Why a team needs a speed plan
A team with no speed control or redirection tool (Follow Me, Rage Powder) tends to rely on the opponent making mistakes. Having at least one speed-control angle is one of the first things worth checking when building a team — this tool's Team Check role-balance section flags it when it's missing.