the GAME_MASTER file was updated today and it finally contains new Base Capture Rates and Buddy Distances for Legendary Pokemon. You can download the latest decoded GAME_MASTER here.
The whole change log lists more than 400 changes, mostly in regards to item sorting.
The interesting part is as follows (bold shows what was changed in this update):
|Pokemon||Base Capture Rate||Base Flee Rate||Buddy Distance||Buddy Type|