Super Mario 3D All-Stars is a collection of Mario's biggest 3D adventures and features Super Mario 64, Super Mario Sunshine, and Super Mario Galaxy. The only other classic 3D Mario title missing from the collection is Super Mario Galaxy 2 for some unknown reason. Related: Super Mario 3D All-Stars Crashes On Modded Nintendo Switch Consoles Here's how players can unlock Luigi in Super Mario Galaxy. Players are able to travel through space for the very first time or revisit to cosmos in the Super Mario 3D All-Stars collection. Fortunately, Luigi can join Mario on one of his biggest adventures across the cosmos. While Mario was out on Isle Delfino cleaning up the gunk on the island, Luigi was clearing out a haunted mansion to make it his own.
Luigi has always been Mario's right-hand man for most of his major adventures. Luigi is an unlockable playable character in Super Mario Galaxy.