I just posted this to reddit (as louman222) and I thought I may as well share it with my fellow FJ pokemon fans.
What you need: 2 GBA/SP's, Gamecube, 2 DS's, GBA cables, GBA to Gamecube cables, firered/leafgreen, ruby/sapphire/emerald, pokemon colosseum, diamond/pearl/platinum, HG/SS, Black/White, Black2/White 2, alot of time.(optional, Action replay or similar devices for GBA or DS)*= preferred
If you haven't guessed, its a run through all of the current pokemon games (ones that can be connected). There's a twist though, it goes with the name.
But first, the rules;
-you must progress in the order of; FR/lLG>colosseum>R/S/E>D/P/PLT>HG/SS>B/W>B2/W2
-A game is complete when you beat the E4, once you hit hall of fame, you may progress to the next game.
-Nicknames allowed, not required
-All characters/trainers must have unique names
-Action Replay is only used for event items/pokemon. nothing else
-Nuzlocke is allowed, but if you fail, you must start from the beginning. If you die, the legacy ends.
Here's where legacy kicks in; When you complete a game, you MUST send a maximum of 3 pokemon(+ all previous legacy pokemon) to the next game. They can be anything. No items may be sent forward on them(except evolution items for that pkmn).
In each game, there are extra objectives to allow sending 1 more pokemon foward in time(nuzlock runs can send only 1 foward), Event only pokemon can be sent forward freely. Finishing local Dex(except exclusives), winning a master contest, or beating a frontier location once award an extra pokemon foward
FR/LG: event only pkmn: deoxys from birth island
R/S/E: Event only pkmn: Mew from faraway extra goals: each completed battle frontier area(only need to do it once)
colosseum: Event only pkmn: Jirachi from bonus disk Extra goals: get ho-oh(purify all shadow pkmn) beat battle mountain
D/P/PL: Event only pkmn:rotom/darkrai/shaymin
HG/SS: Event only pkmn: arceus event legendaries, shiny beasts extra goals: beat the E4 a second time(you can proceed to B/W after you win once), Beat Red
B/W: Event only: zauorak,victini(liberty pass) extra goals:beat cynthia and morimoto
B2/W2 Event only: genesect or any future ones
After finishing B2/W2. you may send however many pokemon you want forward, at this point your goal is to fill the entire dex.
Sorry for the long read, but it's a long winded idea. I would appreciate any feedback, opinions or ideas.
Good luck to any who undertake this mighty quest!