Death is not to be feared, for it is the only thing that we all have in common.
The Quest for the Legends is a very long, very long-lived piece of Pokémon fanfiction. It was started on June 19th 2002 and completed on June 19th 2018; you can read more about it here. It is rated PG-13 to R; look here for details. If you wish to begin reading the story, you can find both of its main versions here; you can also read some spin-off stories if you like. If you have read it already, this minipage also contains various sections for curious readers about everything from the many revisions it has gone through over the years to a map of the Ouen region in which the story happens.
If you're a reader and would like to discuss the story with other readers or post your own fanfiction for feedback, you can go to the forum. Alternatively, if you would like to read some of my ramblings about writing it and updates on the progress of the latest chapters, you can always check the Quest Blog.
If you don't know how you got here or aren't interested, you can always just go back to The Cave of Dragonflies.