Originally Posted by TrueChaos
MAGs only learn PBs at levels 10, 35 and 50. If you want it purely for the PB and it's already level 50, you'll need to start again. It will become a Ushashu at level 55 with the appropriate stats but it will not learn the PB
Not true. Mags can learn PBs well after they are level 50. A level 200 Mag with only 2 PB's can still learn a third PB if it meets the criteria for evolving to another Mag that has a PB you didn't already have.
Here is a quick video I did at work (it was a slow day lol) showing the evolution from Bana to Ushasu and gaining it's 3rd PB. The stats were 20 Def, 0 Pow, 1 Dex and 33 Mind before feeding it one Monofluid.