Again, as we all have said multiple times, anything works in a playthrough. Use a Dragonite if you want. It's strong. Good for Lance. ¯_(☯෴☯)_/¯
But if your looking for competitive, according to here, Dragonite is in OU, for it's hard hitting moves and wide move pool. However, it lacks powerful STAB moves. Look here for more move sets and teams.
Use it well young Airbender
