>Gen 1
The start of a legendary franchise.
>Gen 2
Gave us held items, breeding, shinies and 2 new types.
>Gen 3
Gave us abilities and berry farming.
>Gen 4
Gave us Physical-Special split and Wi-Fi battles.
>Gen 5
Gave us nothing.
>Gen 6
Gave us a new type, mega-evolutions and was the first mainline game to transition to 3D and provide 3D models for all Pokemon.
>Gen 7
Gave us totem battles, SOS battles and z-moves.
>Gen 8
Gave us dynamax and overworld Pokemon.

Notice anything?