>Gen5 (6)
-Hexagons in cover art
-Center Unova is a giant hexagon
-Several elements are hexagon themed
>Gen6 (5)
-gen symbol is a pentagon
-pentagon shaped region
-center city is divided in 5 parts
>gen7 (4)
-gen symbol is a 4 petal flower (or a clover)
-region is divided in 4 parts
-many elements are 4 themed
>gen8 (3)
-gen symbol in its detailed form has 3 spots
-region + DLC makes 3 main areas

What is this countdown for?