The audio comes from a Jonno Plays Pokemon Go best moments video titled around a wild Blastoise encounter, where Jonno reacts as the catch falls apart. The clip isolates his repeated no into a 31 second fail sound that fits the classic YouTube gaming reaction format. It circulates as a user-shared soundboard clip for missed catches, failed throws and unlucky RNG moments. Creators keep using it because the escalating disappointment is instantly recognizable to Pokemon Go players who have lost rare spawns themselves.