Mario and Luigi
If you’re not intimately familiar with the franchise, Robin is here cosplaying as “Dark Moon” Luigi, sporting the Poltergust 5000 ghost-hunting equipment (i.e. a backpack and a broom).
Davy is just Mario and very happy to have a role in his older brother’s fantasy play. (Everyone in the family has in fact been cast: I’m Princess Peach, while Sam is Bowser, and Sol is a mushroom man.) The hats were a present from Pops and Mo—they arrived yesterday in the mail and the kids just about flipped their lids!