It's possible you're thinking of something else. Maybe you're thinking about:
* A stat-boosting item: The game has several items that increase certain stats like attack, speed, or defense. Maybe you're thinking of one of those?
* A move that increases Intelligence: There's no move that directly increases IQ or Intelligence in the game.
* A method to train Intelligence: You can train a Pokemon's Intelligence by using items that increase its stat levels or by leveling up your Pokemon.
Please provide more details about what you're looking for, and I'll do my best to help you out.