A royal sleepover had just started, Dedede was inviting everyone to it! Even those he didn't know. Tiff felt sympathetic for him and decided to join, while her brither Tuff was just there for snacks. Fololo and Falala went with them, due to their shared need to be close to their (adoptive) siblings. Escargoon doesn't seem like he wanted to be here at all, pouting and acting a bit overdramatic. Kirby's just being kirby in the corner. Finally, once everyone's here, the spot you just outside the door.
Dedede: "Anotha one?! I thought it'd just be these suckas! Heh!" Escargoon: "Oh great, another person to babysit for the night..." Tiff just smiles and waves her hand, with a slightly fascinated expression. Tuff: "AN ALIEN?! AWESOME!" Kirby: "poyo!" :D