Let's see. We've had:
Red/Blue
Gold/Silver
Ruby/Sapphire
Diamond/Pearl
Black/White
X/Y
Sun/Moon
Sword/Shield
Scarlet/Violet
What are some ideal names you can see for future Pokemon games?
For my own Purore region, I thought of Star and Shine, but that just sounded lame and kind of unfitting for the region - one game features the source of all magic elements/types (Fire, Ice, Water, Electric...) while the other features the source of all physical and/or entity elements/types (Rock, Grass, Bug, Dragon...). So the stellar theming doesn't really work for game names. I need better names.