virus for nes?

[Ryaan1234]

Hmm, looks like either a pirate or Nintendo had plans to make the game look nicer, with patients and a weirder Mario (God, that picture scares me) and then promptly found out that it left players distracted from the gameplay, which meant early cuts.

Also, the copyright date of 1989 furthers the prototype suspicion, which makes it even cooler, considering there hasn't really been any recent major Nintendo prototypes, which has mostly been late Zelda OoT/MM testing carts.

So, it's a tie to me.

Well, the board has 2 EPROMS, and the actual number on the board (NROM-256-O2?) is the number that's used for retail copies of some first party games (10-Yard Fight and some others). Either this is a prototype (which is strengthened by the fact that it's a first party board and it has EPROMs) or it's a pirate cart that was created from another donor cart. Nintendo tends to keep all their prototypes, so they are usually as rare as hen's teeth, in comparison to everyday third party ones. Perhaps Beaglepuss and MrMark* or DreamTR could shed some light on this.
*"The Super Prototypio Brothers"