Sega accidentally uploaded an OLDER build of Sonic 4 on Wiiware over in Japan. The build got leaked before they had the chance to upload the new one, but if you want to check it out you need to get the file under the release name "ps-wsnj". I tried looking for it for days, but the only way I was able to find a working download was on Usenet. It was on some file upload sites but they got pulled as far as I could tell. So you're going to have to do some work to find it (maybe).
Here are some differences:
1.) Missing sound effects (the same amount of sound effects are included like the PartnerNet build)
2.) The world map, super sonic, and cutscene music is missing
3.) As implied, the world map as we know it now doesn't exist (it's the old stage select menu)
4.) Sonic wags his finger at the title screen (I don't think he did that in the PartnerNet build)
5.) The flowers in Splash Hill zone don't dance and they spin differently than in the final build
6.) You can't progress to the next act after completing a stage like you can in the final build yet
7.) The 100,000 points challenge in Casino Street Zone act 2 is still here, no cards yet
8.) The original Casino Street Act 2 music is here, actually like this version since it sounds different with the sequencing...
9.) More load times like the PartnerNet build
10.) Sonic takes more time to go from walking to "wheel-o-feet" stage like the PartnerNet builds
11.) The minecart stage is intact! You play by tilting the Wiimote.
12.) I noticed some slight layout changes here and there (Casino Street Act 3 is difficult and frustrating in this build).
13.) Sonic can't run past the screen when it reaches the sign post yet.
14.) The sirens in Mad Gear Act 3 aren't playing yet
15.) The blue stripe on the left side of the "act" title screen doesn't move (like the PartnerNet build).
16.) The special stage is played by tilting the Wiimote, like the Minecart level in this build. In the final, you tilt the level with the D-pad on the Wiimote.
17.) While the PartnerNet build doesn't have the drowning music, this build has it.
So in essence, it's a slightly newer PartnerNet build but for the Wii. For comparison sake, the build dates are:
Sonic 4 WiiWare JP (Proto) - February 9th, 2010 20:17
Sonic 4 WiiWare JP (Final) - August 29th, 2010 15:07
This is coming from the 00000000.app file when you extract the .wad. Not sure if these are right, but they sound right.
Have fun (if you can find it)!
This post has been edited by evilhamwizard: 31 December 2010 - 12:03 PM