I totally support you.
But... But... Nebby belongs to Lillie...... I would be unhappy and probably enraged if Ash had Nebby. Squishy being taken care by Bonnie was a nice touch (and most probably because Ash was 6-slotted), I can see that Ash and Lillie work together to help Nebby (at least from what the poster depicts), but by the name of Arceus, if Ash is the one bond with Nebby the most, TPC better Bewear...
That aside, Lillie's afraid of Pokemon means she'll need time again to bond with Nebby, I not sure if she can handling two Pokemon at the same time, although I can foresaw that the Jigglypuff might just do the old gag to cool off the annoying Bewear scene, because the Bewear gag is getting annoying and way too ridiculous by now. For me, chances of Jigglypuff owned by any of the characters is very low, but I wish to be surprised nonetheless.