Hi, momo_yaoyrozu, RocketcatM30W's answer is DRAGON TYPES! (I can't comment)

type: dark. if not dark, poison.
team (dark): krookodile, bisharp, greninja, grimmsnarl, drapion, weavile
team (poison): venusaur, gengar, dragalge, drapion, toxtricity
ik they dont share regions

Water

Hoenn oras

Team:
Swampert
Tentacruel
Wailord
Gyrados
Mega sharpedo

Type: water
home region: Unova
city: Undella town
team: carracosta, mantine, walreine, seismetoad