Well, being these are emulators for ROMs that you LEGALLY own, you should know that you can buy a device that will extract the ROM out of a cartridge.
Google is your friend
Going onto a second note, I found another game that I never knew was for the PPC. I played it MANY years ago and this is one that DEFINITLY should be included in any gamer ROM.
Nethack
nethack-343-ce-ppc.zip
Its an open source RPG. graphics are very ancient, but the fact that it is a completely random adventure each time makes it addictive as heck.