As long as you have Kabuto, Kabutops, or Kabutops ex in play, Omastar's attacks do 20 more damage to the Defending Pokémon (before applying Weakness and Resistance).
Attacks
[Colorless]Drag Off
10
Energy Cost: 1
Before doing damage, you may choose 1 of your opponent's Benched Pokémon and switch it with 1 of the Defending Pokémon. Your opponent chooses the Defending Pokémon to switch.