Janga Pickles
Janga Pickles are a dangerous vegetable in Little King's Story. When animals and some plants consume the Janga Pickles, they become aggressive and change appearance, turning them into UMA. They take three years to become fully pickled.
The Pickle Pot Onii's seeds that it throws are Janga Pickles, and demonstrates that Janga Pickles also have healing properties.
The Fierce Owl's UMA Book description says that the owls only became fierce after eating "tainted seeds". This suggests that the seeds held by the Owl Hag are also Janga Pickles.
In Tyrant Mode, Pancho complains about his rebellious younger cousins eating the Pickles and losing their way. At the end of the adventure, Pancho tells Corobo that he will set off on a quest to convert his cousins back to their normal selves.