It's possible you're thinking of something else, like:
* "Ghost Assist": This is not a real move or ability in Pokemon Ranger.
* "Poke Assist": This is a general term used in the game to describe the assistance you get from a Pokémon partner, such as their special attacks or abilities.
* "Ghost-type Pokémon": These Pokémon have the Ghost type, which can be helpful for certain situations in the game, such as catching other Ghost-type Pokémon or using special moves.
If you can provide more context about what you're trying to remember, I can help you understand better!