A Pokémon with Speed Boost will have their Speed increased by one stage each turn that it is in battle, except for the turn in which it was switched into battle.
Speed will increase up to a maximum of six times.
Speed Boost doesn't have an effect in the Overworld.
Pokémon With Speed Boost
Related ThreadsIs it possible to receive a wifi FEMALE torchic with speed boost? - last post by @ Dec 6, 2013
Speed Boost Rhyperior! - last post by @ Jan 15, 2014
Timid Yanma with Speed Boost or Modest Yanma with Compound? - last post by @ Jul 4, 2007
Speed Boost - last post by @ Jul 25, 2007
Blaziken Speed Boost - last post by @ Nov 16, 2015