Eh, you know how Smash can be referencing stuff that comes out the same console cycle. Very hit or miss. I'm not holding my breath for anything TW101-related.
Hard to say. Only real example of this is mario galaxy.
2006
Wii Sports
Excite Truck
The Legend of Zelda: Twilight Princess
2007
WarioWare: Smooth Moves
Wii Play
Super Paper Mario
Mario Party 8
Big Brain Academy: Wii Degree
Pokémon Battle Revolution
Mario Strikers Charged
Metroid Prime 3: Corruption
Donkey Kong Barrel Blast
Battalion Wars 2
Fire Emblem: Radiant Dawn
Super Mario Galaxy
Link's Crossbow Training
Mario & Sonic at the Olympic Games (Published by Nintendo in Japan only)
Eyeshield 21: The Field's Greatest Warriors (Japan only)
The rest could be argued that they were not popular enough (battalion wars), or were kinda irrelevant for smash (mario party), or were new entries in a series that never really saw smash reps (paper mario), Or were simply sequels to stuff that *DID* make it into smash (fire emblem)
I mean, gamecube didn't have much to go on when melee came out:
2001
Luigi's Mansion
Pikmin
Super Smash Bros. Melee
Wave Race: Blue Storm
So yeah, no luigi's mansion, but there was a pikmin trophy.
As for n64 stuff making it to into melee:
2000
Ridge Racer 64
Mario Tennis
The Legend of Zelda: Majora's Mask
Pokémon Puzzle League
Kirby 64: The Crystal Shards
Excitebike 64
Pokémon Stadium 2
Paper Mario
Mickey's Speedway USA
Sin & Punishment
Mario Party 3
2001
Dr. Mario 64
Animal Crossing
Animal crossing got a trophy, majora's mask got a stage, and sin and punishment was ignored