Follow the stops in order, from Vaniville Town through the eight Gyms to the post-game. Each Pokémon is listed at the first point you can reach a place where it appears; surfing, fishing and Rock Smash spots count from when you can use them. Dex number shows the Central, Coastal and Mountain Pokédexes separately. Tap a row to check it off. Evolves into shows later stages and how they evolve.
Oval Charm: complete all three parts of the Kalos Pokédex, then visit the game director at the Hotel Richissime in Lumiose City. Shiny Charm: it needs the full National Pokédex, which takes trades and transfers from other games.
Mega Stones
Every Mega Stone is a one-time pickup or gift. Some are given to you during the story; the rest glitter on the ground only between 8 and 9 PM, after Professor Sycamore upgrades your Mega Ring in the post-game. A few are exclusive to X or Y. Blazikenite, Latiasite and Latiosite came only with past events and are left out.