Powers up the user's moves when the target's Speed is lowered.
Chase Down (Japanese: 相手素早さ↓時威力↑Power Boost When Opponent Speed is Lowered) is a family of skills in Pokémon Masters EX.
Effect
When the user attacks an opponent that has its Speed lowered by any stat rank, the power of the move is boosted by 10% per rank of this skill. This applies to the Pokémon's attack moves, including buddy moves, but not sync moves or max moves.
buddy moves, but not sync moves or 
max moves.
