I made a mock-up of Chu Chu Rocket. This blog post on Atari-age sorta forced me to do a mock-up because I wanted to imaginate this game playing on the real system.
Blog post:
http://www.atariage.com/forums/blog/168/entry-6780-nice-mice/ Kiwi is my name over there.
Complete mockup:

Tileset:

Sprite sets:
Chu Chu:

Cat:

Reference: I took the level out of this picture.
http://www.ukresistance.co.uk/pics4/chu-chu-mobile.jpg This screen shot is the most unique from the other I search on google. The tiles, and other object help me get an idea what the object would look like upscaled to 24x24 tiles. I used various dream cast picture and video to give me an idea where the number goes.
Comment: I decided to go with 24x24 tileset since the virtual box maximum resolution is 384x224 and Wario Land used 24x24 tiles for their hit-blocks. Surprisely the level size matches the real game, which the tiles are 9 down, 12 across. Everything seems to fit nicely in this mockup. I didn't complete the cat sprite set because I was doing this mock-up for fun and I couldn't stop myself from making it after the guy on that blog kept mentioning Chu-chu Rocket clone for the virtual boy. This whole thing took around 5 hours to do, and Paint Shop Pro 4 didn't have layer so the level barrier looks odd.
I used to be on old pixelation back in 2003-2004. So I decided to rejoin this forums today.