Big Squeekly

Big Squeekly, also known as Mega Squeekly, is the possible leader of the Squeeklies, as well as a boss in Donkey Kong Country Returns and Donkey Kong Country Returns 3D. It is a giant Squeekly that only appears in the level Crowded Cavern, along with the other members of the Squeekly Family. The Donkey Kong Country Returns Prima guide implies that multiple Big Squeeklys exist in the level; however, in the game, only one Big Squeekly can be seen on-screen at a time. They are even larger than Bobbin' Squeeklies.

Donkey Kong Country Returns / Donkey Kong Country Returns 3D
When Donkey and Diddy Kong enter Crowded Cavern, they find the Squeekly Family sleeping quietly in the rocks. In order to progress through the level, the Kongs must use a nearby Rocket Barrel, though it gives off a loud noise that awakens the entire Squeekly Family. The Big Squeekly and the other Squeeklies then start to furiously chase and attack the Kongs throughout the level for awakening them from their sleep.

Big Squeekly is capable of destroying rocky walls with its head and emitting large, purple sonic blasts to damage the Kongs. At the end of the level, Big Squeekly hits into a crystal and gets knocked out.

Donkey Kong Country: Tropical Freeze
In Donkey Kong Country: Tropical Freeze, the Big Squeekly makes a cameo appearance in the background of the level Blurry Flurry, frozen in a block of ice. As the Kongs pass Big Squeekly, its eyes and mouth twitch briefly.