Once you’ve acquired 7 Gym badges, you’ll be able to challenge the final Gym, here at Hammerlocke Stadium. Go over and chat to the staff member at the very end of the corridor to begin the Gym mission. You’ll be taken to the vault, which you visited earlier.
The mission here is pretty simple, but depending on your experience, it may be challenging still. All you have to do is defeat 3 Gym trainers, with the opportunity to take breaks in-between. But all of the battles will be Double Battles and your opponent will trigger a specific weather effect. Anyway, your first battle will start straight away.
Gym Trainer Sebastian
Sebastian relies on summoning rain at the start of battle due to its Drizzle ability. This will power up and Water moves, while allowing to shake off status conditions via its Hydration ability. can also use Tailwind to boost its team’s speed. So try to zap ASAP.
Gym Trainer Camilla
This time, you’ll be blessed with sunny weather thanks to Drought ability. Obviously this will power up Camilla’s Fire-type Pokémon, while weakening your Water-types. If possible, use Rain Dance straight away to turn the tables.
Gym Trainer Aria
is an evolved ; it takes 4x damage from Fire and 2x damage from Flying, Rock, Poison, Bug, Fighting and Steel. That’s a lot of weaknesses! Meanwhile, is an evolved ; it takes 4x damage from Fairy and 2x damage from Ice, Flying, Psychic and Dragon.
This battle centres around hail, triggered by Snow Warning. This will let use Aurora Veil, which reduces physical and special damage. Also, will not take damage from hail because of its Overcoat ability.
Succeed against Raihan’s carefully selected elites and he’ll welcome you to the stadium grounds.
Gym Leader Raihan
Your battle against Raihan will also be a Double Battle. First, he’ll send out and . is a fully evolved and has the Sand Stream ability, which creates a sandstorm when it enters battle. Meanwhile, is a fully evolved ; it takes 4x damage from Ice and 2x damage from Dragon and Fairy.
If you’re uncertain, it might be a good idea to change the weather on your first turn. Rain is a good choice as is weak to Water and does not resist Water. That said, may take advantage of the free turn to set up Stealth Rock, which slightly damages Pokémon you switch in.
Next, Raihan will bring in , which is an evolved . If you changed the weather, attacking will make the sandstorm come back because of its Sand Spit ability. It can also use Glare to inflict paralysis. So try to remove it from the field, rather than change the weather again. But be wary as it can Protect.
Finally, Raihan has a that he can Gigantamax. This new Dragon Pokémon is weak to Ground and Fighting only. Although it has terrible Special Defence, so most special moves will hurt it. Its G-Max Depletion will reduce the PP of its opponent’s most recently used move. It can also use Max Rockfall to change the weather to sandstorm.
Survive Raihan’s draconic malestrom and he’ll reward you with the final Gym badge, the Dragon Badge. Afterwards, you’ll be given TM99 Breaking Swipe and a Dragon Uniform. Well, you’ve done what you came here for; leave the stadium. As you step back into the streets of Hammerlocke, you’ll find Magnolia and Sonia again.
Once you’re back in control, head for the Hammerlocke train station, towards the east, just before the entrance to Route 7. Inside the train station, Hop will catch up with you. Wow, did he defeat Raihan that fast? Or were you taking too long? Anyway, you’ll automatically board the train with Hop. Upon arriving at the next train station, exit to the right to reach Route 10.