Sprites are the monsters that you will see and the guy that you will control in your online rpg. Changing these will greatly change your game. If you cant find what you need there is alot more in the Forums.
Custom Sprite Template
Huge 32 x 64 RMXP Spritesheet
32 x 64 Sprite Template
SNGR 32 x 32 Sprites
Bigsprites Sheet
32 x 64 sprite Sheet Updated
Big Dragon Sprites by Steveo