Super Rod

An upgrade that can catch powerful pokemon such as Gyarados and Poliwhirl, etc.

How To Get
Gen I, and Gen II: Route 112 bridge

Gen III (Hoenn): A fisherman in Mossdeep City

Gen III (Kanto): See Gen I, and Gen II

Gen IV (Sinnoh): Fight Area (only obtainable after completing the ndex)

Gen IV (Johto): See Gen I, and Gen II