If your bucks can cut it, try getting either an i5-4670K or i7-4770K. Those are the most powerful CPUs actually for Dolphin.
If you can´t, don´t worry. Your current CPU is still good for other games that are lightweight (like the one you want): Luigi´s Mansion, Mario Kart-D.D, Mario Party GC series... Even Super Mario Sunshine will be playable on that.
If you can´t, don´t worry. Your current CPU is still good for other games that are lightweight (like the one you want): Luigi´s Mansion, Mario Kart-D.D, Mario Party GC series... Even Super Mario Sunshine will be playable on that.
Rig 1: Windows 10 Home | AMD A6-1450 @ 600/1000/1400 MHz | AMD Radeon HD Graphics 8250 | 4GB RAM | HP Pavilion TouchSmart 11.
Rig 2: Windows 10 Pro | Intel Core i7-2640M @ 780/2800/3500 MHz | Intel HD 3000 Mobile | 8GB RAM | Dell Latitude 6320.