How do you evolve munchlax on dimand and pearl?

Munchlax will only evolve when its happiness is full(it loves u 2 pieces)any time of the day/night,but alot of peaople say that Munchlax are Much better than Snorlax>!>!>!>!>!>!>!>!>!(I AGREE,I HAVE MUNCHLAX ON MY TEAM )