If I made sequals to my custom region if I make one

You forgot about the champion of the region

that's because the champion was gonna be my first OC. His Pokemon are insanely powerful too.
SAFer123's Pokemon:
1: Gholdengo & Samurott-No Gimmicks (They will be working together in the same party slot)
2: Miraidon-No Gimmicks
3: Floette-Mega Evolution
4: Arceus-Z Moves
5: Galarian Articuno-Dynamax
6: Poliwrath-Terastalization

How tf are you supposed to beat that monster without a full lvl 100 team? I'm genuinely curious

That's the crazy part, they're all level 100. but the final boss will be him using all his Pokemon in a boss rush situation where you'll need to work with your rivals & the Elite 4 since he already captured the Gym Leaders (Similar to the Rouge Mega Pokemon in ZA)

aight I'm calling Volo, I might be cooked

Not even Volo can save you

Wait, have you even played Legends Arceus

Yes, Volo was hard, but I beat him & Giratina

image how hard volo would with a fkn mega zygade that also had 3 health bars?

I'd use Poliwrath

Fear

And being the average run & bun nuzlocker

Type ups for the Gym Leaders, & Jacinthe would still be the same. Chill Penguin would have Ice Types, Luka would have Psychic, Pico would have Dragon.

Legendaries/Mythicals in Post game rematches:
Erika-Virizion
Jasmine-Jirachi
Winona-Tornadus
Fantina-Lunala
Korina-Marshadow
Lana-Kyogre
Marnie-Darkrai
Iono-Zapdos
Chill Penguin-Glastrier
Jacinthe-Tapu Fini
Luka-Meloetta
Pico-Rayquaza

Gimmicks:
Erika-Z Moves
Jasmine-Mega Evolution
Winona-Terastalization
Fantina-Dynamax
Korina-Mega Evolution
Lana-Z Moves
Marnie-Dynamax
Iono-Terastalization
Chill Penguin-Terastalization
Jacinthe-Mega Evolution
Luka-Dynamax
Pico-Z Moves

Where's the gigantamax

Well, Marnie would still have her Grimmsnarl, Luka's gonna have an Orbeetle, & Fantina will Gigantamax her Gengar, despite her ace normally being Mismagius. the Final Boss will have a phase where he will Dynamax his Galarian Articuno.

For Mega Evolution, Jasmine will Mega Evolve her Steelix, Korrina will have more Pokemon on her team than she does in X & Y (This will include Mega Lucario), Jacinthe will still have her Mega Clefable & the Final Boss's Mega Evolution phase will involve Mega Floette

For Z Moves, Erika will have her Vileplume use the Grass Z Move, Lana will Either use the Water Z Move for her Primarina, or it's exclusive Z Move, Pico will use the Dragon Z Move with Archaludon, & the Final Boss Z Move Phase will involve Arceus using all of the different type Z Moves

For Terastalization, Winona will Terastalize her Peliper, Iono will Terastalize her Mismagius, Chill Penguin will have an Ice Tera Type Tyranitar that knows only Ice type Moves, & the Final Boss Stage with Terastalization will have his Poliwrath with a special Tera Form

Post Game all the Gym Leaders & Elite 4 Menbers will have Legendary/Mythical Pokemon in their rematches

Chill penguin???!?

Yes, he will use ice types to fit with his ice skills, but his ace will be an Ice Tera Type Tyranitar that knows only ice moves