Instructions
Perform 10,000 Smash Attacks throughout the course of your total play time with ̶0;Super Smash Bros. Brawl.̶1; You do not have to do this consecutively. Execute Smash Attacks with any character by tilting the control stick quickly in one direction ̵2; left, right, up or down ̵2; and pressing the attack button.
Reach Tabuu, the final boss of the ̶0;Subspace Emissary̶1; mode, while playing with a partner.
Allow your partner to distract Tabuu while you wait for a trophy stand to fall from the sky. Do not pick up the trophy stand. Wait until your partner has damaged Tabuu down to one single hit point.
Pick up and throw the trophy at Tabuu, destroying him. This unlocks Tabuu as a playable character.
Enter ̶0;Classic̶1; mode from the main menu. Select Tabuu from the character selection screen and clear the first 11 levels. On the twelfth level, you will fight Master Hand as usual, allowing you to square off with the game's two most prominent boss characters.