Sonic vs Tabuu
I think Sonic will be too fast for Tabuu and Sonic will whip Tabuu's @$$. After all, he did stop Tabuu from harming anyone with his Off Waves using his supersonic speed. He might as well just zoom around the battle field dodging and attacking Tabuu. LIGHTSPEED ATTACK!!!!!! 😆 😂 😱 😄 😈 😛 😎 💃
As big of a Sonic fan as I am, Tabuu killed much of Brawl's cast with just one powerful concentrated attack (albeit temporarily), and Sonic had a sneak attack when he intercepted Tabuu's attack. Something tells me that in a fair fight, starting at neutral position and with no sneak attacks, Sonic (at least in his normal form) would really have his hands full.