>>20306185It has the benefit of being single typed dragon, meaning only other dragon, fairy and ice moves can do 2x the damage to it, unlike say Salamence, Dragonite or Garchomp who all have 4x weakness to ice as well as other weaknesses from flying or ground.
In addition the special bulk lets it take a powerful ice beam or moonblast or draco meteor and can still survive and in return still has a decent atk and sp. atk stats to boost.