To get trophies that describe character's: B-button attacks, successfully complete either "Adventure" mode or "All-Star" mode with that character. Completing "Adventure" unlocks the trophy that displays the "B" attack, & the "Smash B" attack. Completing "All-Star" unlocks "Up & B" attack & "Down & B" Attack.

Note: These special trophies have a [SMASH] icon next to their name. You can unlock them at any difficulty.