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So I was surfing ebay the other day and this MBR caught my eye.  I thought it looked different.  The label was a little different from a normal one.  Wasn't sure what I was looking at. I couldn't find any other examples like it so I went with my gut and bought it.  Just came today and I noticed it was really heavy.  So I opened it up.  I don't have a regular copy of this game to compare but i've seen prototypes and owned one in the past.  Can someone confirm what exactly I have here?  The stickers over the windows say MBR Ver. 4

 

 

 

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  • Like 2

Thats a cool snag , congrats 

These game cart(s) dont surprise me anymore . Its like playing with cards , you either take a risk or you dont . And when you do , it can be rewarding . . . Jmo 

It's possible its a proto, but my impression is no. Looks like a retail label, and for a game like this with relatively low distribution this kind of thing can happen. 

It could be a bugfix version though, or just hand assembled to replace someone's faulty cart. I would get it dumped and compared to known roms.

Its gotta be a proto as the PCB is slotted for EPROM chips, and not retail mask roms.  Not sure why its in that shell though, unless this proto was being developed for a region where the game was released after the NTSC version?

  • 2 weeks later...

We had a discussion on Nintendoage about these. I have one too with the same label and board and so does theirontoupee.
I don't think they are prototypes, but they are pretty neat!

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  • Like 1

thats cool to see someone else with one! yeah its a weird situation.  the label really throws it off.  I see a seller on ebay listing a bunch of "prototypes/sample" that have identical boards.   I dont know much about the bike itself, were there maybe store displays to show it off and maybe this cart was used for the store display?

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