Here's how to get it:
1. Beat the Johto League: You need to have become the Champion of Johto by defeating the Elite Four and Lance.
2. Travel to Kanto: After becoming champion, you'll be sent to the Kanto region, where you will then encounter the Kanto gym leaders.
3. Challenge Clair: Once you've reached Blackthorn City, you can battle Clair and earn your 7th Kanto badge.
Tips for Battling Clair:
* Use strong Electric, Ice, and Rock-type Pokémon: These are super effective against Clair's Dragon-type Pokémon.
* Beware of her Kingdra: Kingdra is a powerful Dragon/Water-type that is especially dangerous.
* Consider using status conditions: Moves like Thunder Wave, Toxic, or Will-O-Wisp can cripple her Pokémon.
* Prepare for a tough battle: Clair is known for being one of the toughest Gym Leaders in Kanto.
Good luck defeating Clair and earning your 7th Kanto badge!