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Regional Ralts and Kirlia.
The full line is based on 'Hiding in plain sight' and 'petty theft' with it's Dark/Fairy typing.
Ralts is found in Preschool and daycare centers, hiding and playing among other kids.They tend to go overlooked a bunch as they store snacks they receive or toys given to them in a special backpack.
Kirlia hides in middle schools and malls, lurking among groups of young kids as they pickpocket and pilfer trinkets to adorn itself.
Gardevoir is designed like a secretary or office worker. They can be found in the most busy of metropolisis and office spaces, sneaking off with the food of other office workers or inviting itself to company meals, it's fae powers tricking humans to seemingly ignore them.
Gallade however drops the fairy typing to be Dark/Fighting. This ruffian gangster lives in the back alleys, bringing other Pokemon into it's gang to cause a ruckus. The blades of it's arms are blocky and hard enough to cause serious damage,along with a massive and hard pompadour it uses to headbutt foes into submission.