Hey guys. I bought Pokemon SoulSilver (like new) from Ebay, and the game arrived today.

The cartridge apparently is fine, without any major wear, and it is definitely legit, not a bootleg...

However, there is one thing that I don´t like about the cartridge: it makes this weird creeking sound when I press the cartridge (the front side and back side against each other).

It sounds as if there is something that makes contact in the cartridge,

or as if there is something sticky inside that sticks when I press it.

Or as if there is something inside that touches when I use a little strenght on it.

Or as if there is air inside it...

I don´t know ho exactly to explain it...

The sound seems to be comming from the part that is just above the metallic contacts...

I was slightly surprised, and went to chech my other DS and 3DS Pokemon games. None of the other games makes any sound whatsoever, no matter how I pressed them.

So my question is, does this happen to other HeartGold/ Soul Silver cartridges, or is it just mine? And what could the reason be?

Or are Gen IV cartridges just made of different material from Gen V onwards? (it is the only Gen IV cartridge I own)

I hpe I can get good answers from you guys. I know the sound shouldn´t mean much, but it is quite annoying...