find out for youself instead of cheating ok :)
Try Pure dragon & a LVL18 Earth?
pure earth dragon
the weakness of gummy dragon is earth,ice and pure plant
breed earth plus tj = pure tj dragon
pure dark dragon
breed pure dragon and plant dragon
Can be gained by playing the potion game, or breeding the Pure Dragon (Gained by breeding any legendary dragon with another legendary dragon. Does not always work) and an Earth Dragon. Takes 48 hours to breed, and 48 hours to hatch.
pure + earth = pure earth dragon
frist breed pure dragon pure dragon must use wind dragon and mirror dragon to it will be pure dragon breed pure plant dragon use pure+plant
breed pure dragon and plant dragon
legendary and fire dragon
to get pure fire dragon you need pure dragon and fire dragon to get the purefire dragon