It's possible you're thinking of the move Swagger in the Pokemon games. This move:
* Increases the opponent's Attack stat by two stages.
* Confuses the opponent.
However, Swagger doesn't have any special effects in the anime, so it's likely not what you're looking for.
Could you provide more information about what you are looking for? For example:
* Which episode of the anime are you thinking of?
* What kind of effect were you expecting?
* Is it possible you are thinking of a different move or ability?
Knowing this will help me understand what you are asking and give you the right answer.