Hyaluronan Mountain (ヒアルロン山, Hiaruron Yama) is the last stage in Glucosamine Desert.
- Squire Rel appears as a peon.
- 3 Doge Darks appear as support.
- 3 Dagshunds together appear at the boss.
This level is similar to Killer Sardines, but save up money until you get your Cat Wallet at MAX Level. 3 Doge Darks will rush to the base, so use Cats that can deliver massive damage to Black enemies such us Weightlifter Cat or Sanada Yukimura to kill the Doge Darks. Following this, proceed to attack the enemy base.
When the Dagshunds appear, call in strong cats such as Bahamut Cat or Heartful Nurse Cat, if you have both, call them in to kill the Dagshunds but be sure protect them with meatshields. Have at least all the treasures, especially the Cat Health Treasures activated and Cat Attack Treasures activated and you should win the level. A Valkyrie Cat (above Level 10) can also help beat them, as well as a well-leveled Angry Delinquent Cat.