They're the profs. from the home console/spinoff games. Krane comes form the GCN game Pokemon XD (Colosseum didn't have a professor, and in XD Krane doesn't give you a starter Pokemon (whether he gives out any at all is unknown, but maybe not given Orre in those games is still recovering and only getting wild Pokemon coming back), but he instead works on helping build the system to purify Shadow Pokemon and teaches you how to snag Pokemon, maybe...?The OG professor, Oak! Except when he comes to stay at my Villa, because he doesn't leave for days! >:/
And who the heck are these guys?:
Professor Krane
Professor P
Professor Hastings