Great reviews on Altered Beast & SMW Joe, SMW was also my favorite of the mario platform series. I also agree that it was one of the best pack-in games of all time. However I have gotten many other great titles as pack-ins including the "Zelda Collector's" in NGC & most recently "Top Spin" tennis in XBOX. The worst pack-in ever that I got was the "Star Wars: Episode 1 Racer" game with N64
Had "Super Mario's Wacky Worlds" been released on CD-I it might have been one of my favs too
below is a link with screenies of that game.
http://spoonman.roarvgm.com/cdi/mario.html