Sonictopfan: I have a 100% Mario Power Tennis (NTSC) save I can upload, if you still need it.
ShadowOne333: If you want to fully 100% MGS: Twin Snakes, you'll need to play it once on each of the five difficulties and collect every dog tag (by holding up enemies) on each difficulty. Also, get both of the two endings. Honestly you'd be best off playing it on Extreme (or the difficulty of your choice) and then downloading a save from GameFAQs with all of the dog tags.
ShadowOne333: If you want to fully 100% MGS: Twin Snakes, you'll need to play it once on each of the five difficulties and collect every dog tag (by holding up enemies) on each difficulty. Also, get both of the two endings. Honestly you'd be best off playing it on Extreme (or the difficulty of your choice) and then downloading a save from GameFAQs with all of the dog tags.