Only found out now
That Pokéman guy sang the song from a popular Dutch commercial from the 90s:
https://youtu.be/vISXqswFBWM?si=X29Pj4dVwaXJu_PC
And I didn't know either that they released a full version back in the day!:
https://m.youtube.com/watch?v=1TtmRvu_9fk