It’s a game music soudtrack, not the game.

https://www.mariowiki.com/Paper_Mario_Game_Music_Soundtrack_CD

I just rebuilt mine a week ago, hadn’t played it in 20+ years, had to replace the key pad rubber, some power bits (I decided to do a clean power mod) and the screen was cracked so I did a ISP screen mod. Looks awsome now and I’m already at level 47 on chips challenge, happaly writing down the codes in my notebook just like as a kid.