64:
Sacred combo 64 (fthrow -> Falcon Punch)
Isai combo (Pikachu, uair-uair-uair, etc, bair)
Krevin's Sexy Fox combo (Dair -> Quickshine -> Fsmash)
Melee:
Captain Falcon's Dair -> Nair -> Knee of doom
WOMBO COMBO
Any combination of dair, shine, and bair with Falco
Brawl:
Well there's not very many real combos in Brawl. I like Yoshi's bair -> ftilt -> flutter feet and bair ->utilt -> uair -> uair -> egg toss (instant death if executed perfecetly from the top platform of BF). I also like chaingrabs that aren't uber, such as Peach's, and I like anything the Ice Climbers do. Banana locking is fun and can almost be considered a combo, but I used to hate it back when I played Nannerless Diddy.