Both regional
Both have a regional form (Alola/Galar/Hisui/Paldea)
The Both regional connection is one of the special groups rules in the daily PokéWired Pokémon puzzle. Two Pokémon are linked by it when this holds: Both have a regional form (Alola/Galar/Hisui/Paldea).
It's not directional: it works both ways, so it doesn't matter which Pokémon goes on the left and which on the right. You'll meet it in Normal puzzles, and it can also show up in the Unlimited and Chain modes.
Special-group connections ask whether two Pokémon share a rare label — legendary, mythical, starter, fossil, baby, paradox and more — so they test your deeper Pokédex knowledge.
Examples
Real Pokémon pairs that satisfy the both regional connection:
Raticate#20Both regional
Raichu#26Both have a regional form
Raichu#26Both regional
Sandslash#28Both have a regional form
Sandslash#28Both regional
Ninetales#38Both have a regional form
Ninetales#38Both regional
Dugtrio#51Both have a regional form