Dragonettes are beautiful, but they are a special needs fish as they slowly eat constantly. Pods have little nutrition, so they eat thousands of them. There is also no guarantee that one trained to frozen foods won't revert back to pods.
There are other interesting foods some will accept, like live worms, live brine shrimp (in a feeder) or even some fish roe, like prawn or flying fish (Chinese food store). All these are easier to deal with than raising pods IME.
If you are dedicated, it can be done. But one lapse and you may loose the fish. Some tanks can produce enough pods naturally, but most can't produce enough, especially if other species like wrasses are in competition with the mandarins.