This poped into my head. My intrest in it dropped so I poorly GIMP'ed Robo-Sub. Then I did the rest cause I had nothing else to do. This is what I hoped that were super unlockables in MKD. Hey people can dream!
Robo Sub? LMFAO. Okay.... most people call the cybernetic version of sub-zero "Ice" because thats the original name given to him when the first fake creator thought him up..
Well just attempt a little bit more editing. Look at your background, its not consistent. The props dont fit together at all. Change colors around to make it look like its all from the same building/structure. And on "robo sub" you could change around his costume a bit so it looks more than just a color swap. Be creative. And have the sprites do more than just stand there and look at each other. Have something happening.