I thought up a few, so here are the basics of it. Borrowing the template of the poster above me, cause it's a good way to do this. The region would be called Exodus and Victory Road/Elite Four reside in Genesis Mountain, which ties into the myth surrounding the legendary in this region called Kukulaconda, The fire/dragon type that brought the spark of creation to the land with help from two others, Tezcabyss (Dark/Dragon) and Apeppour (water/dragon)
Title: The Burning Heart of Fogo City!
Team: Arcanine Lv 10,Cyndaquil Lv. 12, Blaziken Lv 12
TM: Fire Blast
Title: They Sky High Trainer guy!
Team:Archeops Lv. 15, Aerodactyl Lv. 18, Tranquill Lv 20
TM: Aerial Ace
Title:The high voltage gym leader!
Team: Raichu Lv. 20, Electabuzz Lv. 23, Flaffy Lv. 25
TM: Zap Cannon
Gives you the HM Flash when you help in the fight against Team Glyph and their plans for his city
4. GioGio (giorno)
Title: The lowbrow humor crown holder!
Team:Sandshrew Lv 27, Rhydon Lv 29 Nidoking Lv. 31
Title: The Frostbite fighter!
Team: Beartic Lv. 33, Dewgong Lv. 36, Walrein lv. 39
TM: Ice Beam
Title: The Shade wearing shade loving gym leader
Team: Houndoom Lv. 42, Weaville Lv 45, Hydreigon Lv. 48
Title: The industrial-minded gym leader
Team:Skarmory Lv. 51, Scizor Lv. 53, Aggron Lv. 55
TM: Gyro Ball
8. Rock (short for Rocky, Rocky Joe)
Title: The Fighting Teacher of Combate City!
Team: Mienshao Lv. 57, Lucario Lv. 59, Poliwrath Lv. 61
In the sequel, Rock's younger brother Stone takes over with a Tyrogue, Throh and Heracross team.
Team: Tyranitar, Armaldo, Shieldon, Onix, Graveler, Golem (levels 57-61)
Team, Sceptile, Simisage, Venusaur, Tropius, Torterra (Levels 57 -61)
TM's and Elite Four to come later
Team: Espeon, Gothitelle, Sigilyph, Xatu, Musharna, Reuniclus (levels 57-61)
Team: Seviper, Garbodor, Muk, Nidoking, Nidoqueen, Drapion (Levels 57-61)
Champion turns out to be Agent Rem (short for reminiscent) of Team Alpha!
He beats your rival to the previous champion, King (who had a team of Kingdra, Drudiggon, Hydreigon, Dragonite, Dragoair and Fraxure levels 62-66) with his own eclectic team and one of the trapped
legendaries (at level 70) of Genesis Mountain. His team is made up of the final forms of starters from the previous generations (Charizard, Blastoise, Feraligatr, Empoleon, and Swampert) along with the legendary. Once you beat Rem and stop Team Alpha, you're made Champion. Post-game you can fight everybody again but each leader will be at a much higher level, and the Elite four will be at levels 65-70
In the sequel, Rock becomes the Champion (due to your skills as a trainer showing him that there are still great fights out there) and you have to fight him with a stronger fighting team. Once you beat him, he'll invite you to the Pokemon World Tournament and let you reign as champion, enjoying the experience of being a contender again.