(Pokemon) I want to do a particular challenge

An example of the challenge I want to do: https://www.youtube.com/playlist?list=PLbqHnMvmkcWad-ULLMu-vAQwCN0BLuGme

Basically this is called an Egglocke Cagelocke.

How it works:
-- 2 players of the same game (preferably on voice chat/skype, not required) play at the same pace

From the YT description:

Egg Cagelocke Rules:
1. Standard Nuzlocke / Egglocke Rules Apply
---Catch the first Pokemon you encounter on each route
---Swap out captured Pokemon for Eggs
---If a Pokemon faints, it must be released
2. This is not a race! We will play at generally the same pace.
3. Pokemon can NOT be switched with PC Pokemon.
CAGE MATCH;
4. After each Gym Battle, we will face off in a Cage Match!
---Each Player sends 1 Pokemon into the Cage Match
---Pokemon will be adjusted to lv50
---Pokemon may only be sent into the Cage Match twice
5. The losing Pokemon in the Cage Match must be released.
6. The Winning Pokemon chooses ONE of THREE rewards!
---Unlimited TM Usage for that Pokemon
---Unlimited Held Item Usage for that Pokemon (Mega Stones included)
----1 Free Revival for that Pokemon from an in-game Faint

tl;dr steps:
-- Two people play game
-- Catch first Pokemon on each route
-- Swap caught Pokemon with egg
-- Level hatched pokemon with rare candies to caught pokemon's level
-- Fainting = death
-- After each gym, players will 1v1 battle and losing Pokemon is dead
-- Other rules can probably be adjusted

Some stipulations:
-- I only have Y available atm so we might need to use XY
-- I lost the disc for my AR3DS so I'll need to get a new one for the rare candies. Other player might need one as well.
-- We may need to breed eggs and have a third party hold onto them or mix them up and split them between us

Basically? It requires some setup to make it work, but I think it'd be a fun thing to do.