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Jamming is a term used in Pokémon Contests. It means that an appeal can lower the other opponent's appeal. While some moves give you appeal from the judges, jamming reduces your opponents while raising yours.

Moves that can have a jamming effect

Generation III

• Aurora Beam
• Blast Burn
• Bubblebeam
• Cotton Spore
• Hail
• Hydro Cannon
• Ice Beam
• Icicle Spear
• Icy Wind
• Lovely Kiss
• Perish Song
• Petal Dance
• Sheer Cold
• Spore
• Tri Attack
• Will-o-Wisp

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