In the film, it attempts to devour Flint and his group throughout their encounters. But Sam Sparks notice something that doesn't seem right, it was actually defending its children from Live Corp when a Sentinel of Safety stepped on it's child's tail. It is the largest and most vicious Food Animal on the island and is thus considered the "King of Food Beasts".
Near the end, it helps Flint and his father build a device to get into the Live Corp factory to rescue Flint's friends and the other Foodimals. It's also seen alongside Manny when the group tries to capture Chester V