A Physical Pokemon is a Pokemon that makes use of its Attack stat, while a Special Pokemon makes use of its Special Attack stat. There are 3 types of moves: Physical, Special, and Status. When a Pokemon attacks with a Physical move, it's the Attack stat that is used, and the opposing Pokemon's HP and Defence. If you use a Special move, it's your Pokemon's Special Attack that is used for calculating the damage, and the opposing Pokemon's HP and Special Defence.
What stat does a Pokemon use when it attacks with a special move?
What item increases Special Attack by one stage?
What is the difference between a Physical and Special Attacker?