Phobos and Deimos are Rei's pet Crows and she sometimes calls upon them to attack her foes in the manga and video games.
Manga[]
In the Dark Kingdom Arc, Sailor Mars would call upon Phobos and Deimos to attack and follow it up with Akuryo Taisan. She did this against Jadeite in her introductory chapter and against Zoisite in Casablanca Memory.
Videogames[]
In the arcade game, Phobos and Deimos make a brief appearance when summoned by Sailor Mars in an animated sequence. It stuns of all the enemies on screen. Three crystals are required to perform this attack.