^_^ Yay! This thread makes me happy... it's really awesome to see things that were never actually added into the game... I've also wondered if there's a way to import your own sprites into the game... of course I have barely any programming skills, so had no idea even how to start... I created some sprites anyway. I really liked the Addon Sparks enemy. It's probably supposed to be a fox, but I always think of it as a cat o_o. I used the walking animation for it on J2O and made some of my own animations... (an idle animation for it, and some jumping ones too.) I thought it'd be neat if you could morph into different characters like you can with the bird and the frog in JJ2. Anyway, here are the sprites I had for it. The ones made by me aren't very good, but it was worth a try XD...

http://img.photobucket.com/albums/v4...mpleftanim.gif
http://img.photobucket.com/albums/v4...flipsprite.gif
http://img.photobucket.com/albums/v4...atidleanim.gif
http://img.photobucket.com/albums/v4.../catsprite.gif
http://img.photobucket.com/albums/v4...prightanim.gif

Ok, I'm done ranting now. XP