Here’s the quick scoop: to breed Yool in My Singing Monsters, use Thumpies + Congle on Cold Island. It’s a seasonal monster, so availability can be limited, and the breeding result still depends on luck.

Breeding combo

  • Thumpies + Congle is the standard combination for Yool.
  • Fan tutorials and community posts consistently repeat the same pairing for Yool and its rare variant.
  • If you’re aiming for better odds, players often suggest lighting torches before breeding.

Extra notes

  • Yool is a Seasonal Monster tied to the Festival of Yay.
  • It can be found on Cold Island , and also appears on other game areas after being unlocked or teleported.
  • The breeding time is listed as 1 day and 12 hours by default.

Practical tips

  1. Use a high-level Thumpies and Congle if you have them.
  2. Breed during Yool’s seasonal availability window when possible.
  3. Light torches for a small luck boost, since breeding is still RNG-based.

Community discussion also matches this answer: players say the combo is correct, but success is still mostly luck.

Тldr: Thumpies + Congle on Cold Island is the breed for Yool.