Good question. As of now demiveemon's spot is being held by Chibomon. I'm working on his sprite though, so as soon as I'm finished he will replace Chibomon.
The only reason Chibomon is in the game, is because I wasn't confident in my spriting ability when I began the hack. I couldn't find a sprite for DemiVeemon, so I settled for Chibomon. Now I'm getting the hang of it