hay guyz i dont like falcos to much either wouldnt it be graeat if he was taken out and replaced with my DREAM ROSTER of favoritests characters?!!lol
No. Seriously. No.
(Though, from a strict relevance standpoint - ignoring moveset and Smash64 nostalagia - I personally think Mewtwo was more deserving than Jigglypuff. But then again we're dealing with a roster with the likes of Mr. Game & Watch and Ice Climbers... relevance isn't exactly a top priority in some cases.)
Falco is another case.... his character has lost the majority of his popularity... heck, he wasn't very important in the first games to begin with. He has been replaced with the Nintendo signature love interest, Krystal. Krystal deserved the spot more than Falco did, seeing that her appearances lately have had more significance than Falco's...
Also, you can't use the excuse that Krystal represents the downfall of Star Fox, all you hardcore Star Fox fans who have been around since the original, me included, can't just be selfish and say that the originals are the only good ones and the newer ones aren't as good because they're not the same, things need to be changed up a bit, like the Zelda series which all have similar stories except for the cell shaded ones, the handheld ones, 2, TP which is still kinda similar, and the CD-I ones which don't really count.
Like it or not, the newer ones are popular amongst a lot of fans and have sold more copies than the originals.