JumpChain! is a series of interconnected CYOAs wherein the jumper, either you or a character you create, keeps the abilities and items gained from previous JumpChain! CYOAs as he or she moves through subsequent JumpChain! CYOAs.
The overall (minimal) rules govern campaign management for the protagonist. Most of the "CYOAs" (Choose-Your-Own-Adventure) infringe on well-known intellectual properties, though the entire game is fan-created and freely distributed (each "CYOA" also is sometimes referred to as a "Jump"). The game offers a unique perspective on the choose-your-own-adventure genre by causing all of the (disparate) adventures to be shared by a single character that gains experience and items. The rules are quite forgiving - characters who die in a "CYOA" merely return to their state immediately prior to the adventure, with no penalties.
Pokémon Trainer CYOA is traditionally the first "CYOA" in the chain, and player preference thereafter drives the campaign. Some "CYOAs" are considered end-state adventures, and completing them ends the campaign for the character.