if like, a kid feels unsafe and wants him there, he'll stay in their room with them. I tend to think this happened with Rick. but even on a practical level, he won't actually Bed Share because he is very restless in his sleep and wakes up a lot
depending on setting, it can be difficult to even get him to come inside for the night. when he was first in VR, he camped almost all the time because being in the Pokémon Center just did not feel safe
SEVERAL YEARS LATER NOW he is inside most nights, but he does still Wander sometimes, and he does share his room with Lust, but it is still a very, very weird anomaly to him