Carts with the wrong game

[yeahhhh]

I have a copy of Pro Yakyuu Family Stadium '87 in the legit cart and everything but when i turn it on its actually Xevious.
I also have Peach Boy Legend 2 but when I put it in its some board game like simulation with trains that just plays through on its own.

I've never had this happen before when buying games and have no experience with pirate games or anything is  this something that happens a lot?  I can provide pics if anyone wants to try to identify the second game

[M-Tee]

Is the train game Tetsudou Ou?

[maxellnormalbias]

I don't know about Ali Express-era pirates, but here's my theories:

Dendy-era pirates:
Cartridges would sometimes be sent in without stickers and the stickers would be stuck on later. Since this is left to the people who work at the shop, which may not know much about video games, they might use the wrong stickers.

Early NES games:
Sometimes, a kid would buy a game, swap the board with one he already owned, then return the tampered game, effectively stealing a game. This was common practice according to a random person I talked to at Willow Video.

[yeahhhh]

-its a little different I guess train board games are a popular theme sorry for the lackluster pictures

-Thats interesting I thought  at first they might just be a manufacturing error because Pro Yakyuu Family Stadium '87 and Xevious are namco and peach boy 2 and this train game are hudson soft but i dont know what the chances are of the manufacturers accidentally swapping the pcbs

[senseiman]

The train game is Momotaro Dentetsu.  Its interesting to find a game like that, I suppose maybe someone opened the carts up and switched the boards or something?

[nerdynebraskan]

Yeah, sounds to me like someone just opened two carts and swapped their PCBs.

I used to buy up entire NES collections and resell the doubles. (It was how I built up most of my own NES collection.) When I had to clean and test the games, I'd usually do the good stuff first. As I was processing a collection one day, I pulled a Metroid cart out of the stack, cleaned it, and fired it up a few minutes later. Imagine my surprise when the copyright screen loaded up for Top Gun!

I was momentarily irritated with the swap, until I noticed there was a Top Gun in the collection also. (I normally saved those for last, because the game is worthless and common. I had twenty copies at one time, because every collection I bought seemed to have one and nobody wanted to buy it from me.) I cleaned it immediately, and was relieved when I tested it to be greeted with the title screen for Metroid.

Since those two carts both had simple flat screws (as older NES carts tend to), I just figured the last owner had just screwed around with them.