In Patapon 2, you unlock him by beating Centura 3 times. This game will cost Ka-ching. If you take care of Pop Bean well enough, she will give you some level 1 - 4 vegetables, but you must catch them for it to count, or else they become useless, so watch carefully your time. The trick to getting the vegetables is to listen on how Pop Bean throws it. When she throws three vegetables one after the other, you have to press the O button three times, but you have to watch your timing, or else you will not get vegetable.