Instructions
Unlock All Characters Quickly
Navigate to "Special Brawl" from the main menu. Set the game type to "Stamina," where the first character to reach 0 stamina loses the match. Set the CPU's health to "1" and the player character's health to anything higher.
Turn on "Flower Mode," where each character starts the match with a poison flower, and set the life stock to 1 in the "Special Brawl" menu. The life stock denotes the number of times a character must be defeated before the match is completed. The CPU should instantly be defeated at the beginning of each match.
Press "Start" on the controller repeatedly to continue through the game screens and battle each character. It should take about an hour to unlock all 35 characters.
Earn the Mewtwo Trophy
Navigate to "All-Star Mode" from the main menu. Change the "Difficult" setting to "Intense."
Push "Start." Each battle will pit the player against a group of characters. The characters appear in chronological order relating to the release date of the game in which they starred.
Complete all 19 stages of this mode to obtain the Mewtwo trophy.