Battle · Blaine (Cinnabar Gym)
Beating Blaine
Ninetales L48, Rapidash L50 and Arcanine L54 - bring water.
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Blaine is a pure Fire gym, which by this point in the game you are thoroughly equipped for.
Find the Secret Key first
The gym door is locked. The key is deep inside the Pokemon Mansion, along with TM14 Blizzard and TM22 SolarBeam.
Answer the quiz doors
Each door asks a Pokemon trivia question. Answer correctly and you skip the trainer behind it.
Lead a Water type
Blastoise (the Vermilion gift), the Silph Co. Lapras, or a Starmie. Surf and BubbleBeam are 2x on all three of his Pokemon.
Rock works too
Rhyhorn or a Rock Slide user also hits Fire for 2x.
Fight
Arcanine at L54 hits hardest - keep your Water lead healthy. Reward: Volcano Badge (+12.5% Special) and TM38 Fire Blast.