Unknown Song - Pika Girl (footage from alternate universe P0K3W041LD) 

In universe description:
"Pika Girl was initially discovered in an old, low quality 2009 Pokemon flash game on Newgrounds called Pikachu Jump, where a 57 snippet of it played on loop. The person who made the game went inactive years ago, so asking them where the song is from is no help."
Source: • helluva boss if it was...
Pika Girl subreddit: / 1ogqag72ge