First stage: pretty simple hold the dragon off when he bites and jump from platform to plat form without falling down the gaps dond for get to restock your snow balls (if you don't know how to restock your snowballs then ground bounce the piles of snow that's jump and A+down to ground bounce).
Second stage: a bit harder wait for it
You stand in the middle of the plat form the he will fly over dropping two icicles they will miss you then he will appear again on one side launching 1 icicle dodge it he will go back down and re-appear AND BITE U, DODGE HIM!!! And shoot him with your snow blaster then ground bounce him repeat second stage 4 times and he should die tell me if this helped !!