Overview
A spoiler-light roadmap for collectors and challengers.
How it works
After the main story, Lumiose City remains open for collecting, training and completing side activities. Finishing the story does not mean you have completed the Pokédex or obtained every Mega Stone.
How to play
Review unfinished side missions, look for missed wild-zone encounters, check Mega Evolution options and revisit challenging bosses after upgrading the party. If you own Mega Dimension, the expansion introduces a new story after the base credits.
Mistakes to avoid
Do not describe an arbitrary checklist as a certified 100% completion tracker. Requirements can vary with DLC ownership, online seasons and game updates.
Go further: Postgame checklist after the credits
Collection first
Separate your ordinary Pokédex progress, megaevolution discoveries and DLC discoveries. A well-organized checklist prevents you from mistaking one list for the whole game.
Battle goals
Try the Z-A Battle Club if you enjoy live competitive battles, but remember that seasonal rewards and online connectivity are separate concerns.
Backlog hygiene
Mark down which missions and areas you have already investigated, then focus on actual unfinished objectives rather than repeatedly searching the same spot.