Agatha's Gengar (Adventures)

Agatha's Gengar is a /-type Pokémon owned by Agatha.

Yellow arc
When Blue went to rescue a boy's Haunter, Agatha waited with her Ghost Pokémon. When Blue came, she put him to sleep and had Gengar use Dream Eater on him, but was quickly defeated.

Afterwards, Blue worked with Koga and knocked down Agatha, who sent Gengar, who shifted between shadows to defeat them. Blue made a strategy, flashing out light to reveal Gengar and defeat it.