Quarter Final 1: Solid Snake vs. Jin Kazama vs. Goku vs. Dante vs. Gohan

Quarter Final 2: Uzumaki Naruto vs. Uchiha Sasuke vs. ???? vs. ????

Quarter Final 3: ???? vs. ???? vs. ???? vs. ????

Quarter Final 4: Same as above

Now:

1. Jack Carver

2. Miles "Tails" Prower

3. Zidane Tribal

4. Ash

5. Mario

My vote goes for Tails.