You Call That A Knife?

Walkthrough[]

Mhebi Juhbily tells you to go away and stop pestering. Grab a buddy (and a Sandfish) and have your buddy trade the Sandfish to her. While this is happening, check the Shed behind her. If you do it correctly, you'll see she's hiding a tonberry and get a cutscene about repairing a rusted tonberry knife. Please note that you will not lose the Sandfish so only one is needed if you are getting the cutscene for multiple people.
Talk to Vah Keshura in the Weapons shop who will tell you about a kitchen in Temple of Uggalepih and a master chef named Chef Nonberry.
Obtain a Tonberry Board from either a Tonberry Pursuer in the Temple of Uggalepih or from a Tonberry Shadower in Yhoator Jungle or from a Tonberry Trailer in Den of Rancor.
Go to the J-12 in Yhoator Jungle and enter the Temple of Uggalepih.
Follow the path until you hit the junction in H-9 and head North. Once you hit the next intersection at G-7, head north again until you zone back into Yhoator Jungle.
Stay on the ledge, go left and zone in to the temple again at H-11.
Head west then south until you reach a gate. Head through the gate and keep heading south until you reach H-10. Once here, turn west and go past the Granite door.
Talk to Chef Nonberry and then trade him the Tonberry Board and he will give you a key item Nonberry's Knife to take back to Mhebi Juhbily.
Return to Mhebi Juhbily to complete the quest.

Client: Mhebi Juhbily (Near Mihgo's Residence, Kazham)
Summary:

Mhebi wants to set her Tonberry free, but first, someone has to do something about his rusty knife.