Despite being one of the most popular Rocket Gang songs for the entire anime series, the song made its ending debut in Pocket Monsters Best Wishes Season 2 even though the song was almost 15 years old at that time. Rocket Gang Forever was the second ending song used in Best Wishes Season 2 and it replaced Mitemite kotchitchi (みてみて☆こっちっち).
The ending features brief clips of the Rocket Gang's appearances throughout the entire anime series. The ending starts off with the wanted poster from the second episode of the anime series. A bunch of Nurse Joy's Pikachu's from that episode then shocks the Rocket Gang. The scene from Sonansu and the Pokémon Trade Meet!! where Wobbuffet makes its debut with the Rocket Gang is the next clip that is shown.
The scene from the Advanced Generation episode Manene Enters! House of Relaxation! showing Kojiro leaving his Chirean with elderly caretakers at his old vacation home near Saffron City and then Manene joining him is displayed. The next major scene features Musashi releasing her Dokucale and destroying its monster ball in the Diamond and Pearl episode Sayonara Dokucale!.