Understand Super Smash Bros Brawl's unlock system. Two are unlocked by completing Classic Mode and All-Star Mode with Sonic; …

Sonic has the fastest dash speed in the game.

Play 300 Brawls (unlocking Brawl, each completed Brawl after 300th will have Sonic's unlocking Brawl afterwards until you unlock him, medium difficulty method because of the sheer grind to play that many Brawls, even with Flower 1-Stamina CPU Brawls) Sonic dashes so fast that when wearing a Bunny Hood, he can outrace both the Big Blue track and the water slope on Distant Planet, to the point of self-destructing. Clear Classic with 10 characters (unlocking Brawl, one chance, hardest method because of the 1-shot aspect, easy to accomplish though) 3. While the original 21 playable characters are unlocked the first time that you start SSBB, you'll need to unlock another 14 characters by completing challenges. Sonic The Hedgehog (ソニック・ザ・ヘッジホッグ, Sonikku za Hejjihoggu) is a character from SEGA who appears in Super Smash Bros. Brawl as one of the two third-party characters, the other being Snake.