Kanto:

• Red and Blue
• FireRed and LeafGreen

Johto:

• Gold, Silver, and Crystal
• HeartGold and SoulSilver

Hoenn:

• Ruby and Sapphire
• Omega Ruby and Alpha Sapphire

Sinnoh:

• Diamond and Pearl

Unova:

• Black and White

Kalos:

• X and Y

Alola:

• Sun and Moon

Galar:

• Sword and Shield