411 REFERENCE · Wikibooks
Pokémon/Pokédex/Sonicboom
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Sonicboom always does 20 damage.
In the very beginning of the game, this is a very useful move. As the game progresses, it becomes less useful, becoming near useless by the midgame and laughable by the endgame.