Here's what makes it unique:
* Better Catch Rate: It has a higher catch rate than the Old Rod, making it easier to catch rarer Pokemon.
* Access to New Pokemon: The Good Rod lets you catch Pokemon that cannot be found with the Old Rod, including some valuable and rare ones.
To get the Good Rod:
1. Beat the Gym Leader: You need to defeat the third Gym Leader, Flannery, in Slateport City.
2. Visit the Old Man: Talk to the old man sitting on the pier near the Slateport City Gym. He'll give you the Good Rod after you defeat Flannery.
Enjoy your fishing adventures with the Good Rod in Pokemon Ruby!