Why Did This Turned Into Silver Game Boy Advance Cartridge

Chosen Solution

So I’ve recently bought an expensive gba game, Pokemon Leafgreen, I decided to look the inside of the cartridge and I’ve noticed a discoloration

That should be colored gold right? Like this?

https://chieftain20.files.wordpress.com/… What is the reason why it changed to silver? Is this normal? What should I do? Can this ruin my cartridge in the near future? Help

From the looks of your picture, someone has service the cartridge or its like this from the factory. The silver is solder, this should make no difference in your cartridge so long as it was repaired, and was done correctly.