[Mettaton laughs a bit as his son pouts in his hands, clearly not happy with the idea of a "bed time". He pitches his voice to a bit of a whisper.]

He may not need sleep, but I do every now and then. Outside of charging, I mean. About once every one to two weeks or so.

[He raises his voice back to its regular volume.]

Of course, Alphys! I'm going to make him some MTT-Brand Pajamas and he will be tickled pink to sleep in such high fashion.