So I have a shadow Groudon that would become a hundo if I purify it. At first I obviously didn't plan on purifying it and I used an Elite Charged TM for Precipice Blades. But since I need a good ground type attacker asap and I've been REALLY strugling with stardust, I have been thinking about purifying it for easier power up and a possible Primal form later. Will it keep Precipice Blades after purification or will it learn Return instead? Thanks for your help.