League

There are seven leagues to compete in and beat to become champion of Magikarp Jump

Friend League
The first league and the easiest. Probably will beat it with your first Magikarp.

Victory gives you Light Ball (Pikachu Support)

Quick League
Second League.

After your first victory you get Important Sign Decoration from Mayor Karp.

Victory gives you Mystic Water (Piplup support)

Heavy League
Third League.

Victory gives you Octillary Pot Decoration

Great League
Fourth League

Victory gives you Amulet Coin (Meowth Support)

Fast League
Fifth League Boss: Kareign (female) Pink Dapples- 2.41M JP/ 76.95m jump

Victory gets you the Sudowoodo Bonzai (+29% coins from events)

Luxury League
Sixth League

Victory gets you: Miracle Seed (Bulbasaur Support)