You go to jubilife city the go to the left where you see a wooden house there is a randem guy who gives it to you
In the house that connects Jubilife City to Route 218.
You get from a fishermanin jubiliffe city
There is a fisher man that gives you it in the house to the left of Jubilife City.
Go to Jubilife city and leave through the exit on the left side. There is a building you go through with a guard to it and a random guy who gives you the rod.