The Pouch is an Event Item in Riviera: The Promised Land. It is received from Gill after finishing the Nelde Ruins stage. It is used to carry the Fish obtained in Tetyth.
Acquirement: Speak to Gill after receiving the Fishing Rod from his father Kyle. Stage 3 must be completed, and it must be done before moving on to Stage 4.
Function: Needed to keep the Fish in your Inventory.