How do you flip sprites?

You could use SPDEF definition_number, U, V, Sprite_With, Sprite_Height, #SPREVH if you want the reversed the image used by the sprite and SPDEF definition_number, U, V, Sprite_With, Sprite_Height, 0 to define the image without horizontal reverse. However, you need to do this each time you flip your sprite for each image used by it. The other way is to define the normal and the flipped image on different definition number. Edit: U,V are the coordinates (X,Y) where the sprite begin in GPR4: