I don't know...
The graphics in this one are really good (nice animations), and the voices and music are excellent, but I just didn't find about 95% of the jokes funny (although the satires on Japan were good, as well as the Metroid thing). I haven't actually played many of the games that you mentioned, so that's probably why.
One more note: The PSP CERTAINLY has disadvantages, one of the biggest being if you're into the emulation scene (Sony forces firmware upgrades with new games, so basically every time you buy a new game all of your homebrew programs and emulators could suddenly stop working). It would've been funny if you'd mentioned that, maybe (and if you don't know about the emulation scene, then you're not really true gamers ;P).