Battle Stadium Head
Already said I was gonna do that...
Although I did word it pretty terribly, I will have a list based on chronological order in which you can obtain them, they will be in their own list of 'stones available during the story' (working title lol)For now you can just ctrl+f to find stuff (or use the forums' search function) to see what has been mentioned so far. I have been planning to make 3 lists with; all mega stones (alphabetical), pre-E4 (separated by before and after Groudon/Kyogre, in order you can obtain them) and post game. So watch this space for that development