[The robot smiles brighter to see Nico on camera, and maybe it even broadens when he sees her pout. But for the first time, Mettaton's reply isn't forthright. He seems to regard the camera nonplussed, contemplative, glancing away then up toward the ceiling in thought. He even hums to complete the picture.

This is a common obstacle. He doesn't really know if it's because Nico doesn't know they have necromancers, or if she doesn't know he has a soul. either way, Mettaton's willing to divulge both bits of information.]

Well. Yes. They dumped me in a spare closet, for safekeeping. How unglamorous! Technologically inept as the populace is... The plan was to find someone to repair me, I was told. However. After the Coven's team of necromancers resurrected my Bonded, he insisted that they resurrect me, too.

So they did. And... Ta-da! It worked!

[It might very well imply he has a soul to resurrect.]