How would you have 2 animations going at once?

Say I want a player to be wearing a hat, how would I add the hat to the animation without having to remake an animation with every character and every hat.

 

Add the hat object as a child of the player's head bone.

 

Well it's for 2d actually, and there's different sprites for walking up/down/left/right

 

Either you animate the character with the hat in the same sheet or animate the Hat separately in its own spritesheet. Not much choice for 2D its one or the other.

 

so if I want hat and armor in the game I would need to make 4 total sprite sheets, one with the character with nothing, one with the character and hat, one with the character and armor, and one with the character, armor and hat?