This sound is from Wubbox Soundboard

Wubbox is a Supernatural Monster in the mobile game My Singing Monsters. It was added to the game on May 10, 2013, during Version 1.1.6. It is available on all Natural Islands, Ethereal, Gold, and Wublin Islands. Wubbox is obtained in a way unlike other Monsters. It first must be purchased in the Market for 75 million Coins or 150,000 Shards on Ethereal Island. Then, it needs to incubate for two days. When hatched, it is placed as its Box form, which is activated by boxing all required Monsters. Wubbox's activation is similar to that of a Rare or Epic Monster, but instead of requiring specific Monsters to be bred, Wubbox requires the player to "box" all of the Natural or Ethereal Monsters on the island it is placed on.