Each costume set is worth $0.75 for either the 3DS or the WiiU and $1.15 for both platforms; the whole costume bundle costs $6 if bought for either platform and $9.20 for both.
Mewtwo strikes back
Those who didn't buy both versions of the game, however, will have to wait until April 28 to be able to play as Mewtwo. The character will be available from the DLC shop for $3.99 for either 3DS or WiiU or $4.99 for both platforms.
Nintendo plans to release Lucas form Earthbound next, scheduling him for a June release.
Meanwhile, here's Mewtwo in action.