Nyarth's Song features the Rocket Gang Nyarth's singing with a guitar at night as he reflects upon life. The song is sung by Nyarth's Japanese voice actress Inuko Inuyama.
The ending is pretty static throughout with only a few minor animation changes. Nyarth is sitting down under a tree as he looks up into the sky and at the moon. The moon changes to different Pokémon as the song progresses.
Nyarth's Song - Inuyama Inuko and Sakishima Meeting (Yukito Shinra x Isamu Shimoji).ver ♪
Inuko Inuyama, the voice actress of Nyarth and a mainstay actress of the theater company "Nylon 100°C", sang Nyarth's Song for the first time in 13 years, accompanied by SAKISHIMA meeting (Yukito Ara x Isamu Shimoji 新良幸人×下地イサム) remotely as it was filmed during the COVID-19 pandemic. It was published to YouTube on May 26th, 2020.