The greatest game ever made in my opinion.
1. More Characters, everybodies been looking forward to more characters and new ones at that. Snake, Pit, and Meta- Knight are my best ones.
2. Final Smash. The ultimate move of every character instead just a smash move. My favorites are Mario's, Samus', and Snake's.
3. New and improved items. I love the addition of the smart bomb from Star Fox, and the new Assist Trophies are great in a tight situation.
4. Some new moves for old Characters. Aparrently you can teach an old dog new tricks, Ganondorfs new mve is great and comes in handy.
5. Graphics. Even for Wii the graphics on the cut scenes were outstanding.
6. An actual story- line. The improved adventure mode, or The Subspace Emissary is much better than running around on platforms fighting mindless creatures.