Ok, now that the new Rotom forms have been revealed, I could see that as Brock's fifth/sixth Pokemon in Sinnoh(I still want Tangrowth for Brock!!!). Fridge, Washer, Toaster, Mower, and a Fan. It its Brock to the tee. And o does Tangrowth as a nanny for a breeder.
Now I have some hairbrained ideas.
You know the new Sinnoh evo Pokemon added to the Platinum Dex?
Well what if some of them are foreshadowing future captures? Cuz now all of th main group Pokemon are in the dex, and maybe Dawn will catch Houndour. After typing that, I realize how ridiculous that reason for her getting Houndour is. So, lol.