It’s released dynamax Pokémon in the special gym. It had power spot before dynamax Pokémon appear.
I don’t know how it goes but just doing trials and errors near by.
Catching about ten dynamax Pokémon and let them in the gym.
It’s a big problem being lack of energy to go on battle so I can’t strengthen Pokémon enough. It means that we should buy energy, otherwise we can’t go up to the level. Niantic is promoting new business to make money.