This is the final battle stage for any worthy Pokémon trainer. They must defeat the Elite 4 before coming to The Dragon's Lair. This arena is burning hot, it is the Lair of a Dragon. Trainers must battle on this arena when taking on the Dragon Champion. If the Dragon Champion is defeated the winning trainer gets to put their Pokémon into the Dragon's Lair(Hall of fame).
If you have made it all the way here I am impressed. It must have been difficult defeating all of the gym leaders and Elite 4. But I will not be defeated so easily though, it will take a lot of courage and strength to beat me. Make sure you are your Pokémon are prepared for the challenge of your life. Good Luck to all of you Trainers who have made it this far.