How do I extract .bin files?

[ItsMeGamerAndBFDIer7]

Hello. I extracted the files of Mario Party 10, but I looked in some of the game files, until I saw a file that had something that said "pc" or "npc", followed by a number, followed by the character's name, and the file was .bin. I believe that those are where the character models are, because I extracted the game for extracting character models. Any help?