It is very likely that it will be opened in the last episode, though we cannot know for certain. It is possible, for example, that it could be opened in the first part of a two-part finale.
Probably. Since the box was introduced in the pilot and the Mane 6 finding their keys has been a story arc for the season, it will likely be concluded as part of what appears to be a two-part finale, as episode 24 will involve the Equestria Games.
Yes, the box on the tree of harmony will be opened in the Twilight's kingdom.
Yes. In the season finale, the box under the Tree of Harmony opened and the ponies transformed into their Rainbow Power equivalents. They looked exactly like the toyline this design spawned from.
No information has been revealed as to what exactly will happen when the box is opened. It is supposed to be a mystery.
Peace and Friendship Stadium is an indoor arena in Greece and was opened on 1983.
You're asking a question that's irrelevant to the plot since the episode ended seconds after the vault opened, having said that, presumably no one opened it, it automatically opened when the bank opened for business. If you need to believe someone opened it, then the bank manager opened it.
"Come On " by the Panderers
The song is "Buena" by Morphine
Larry David opened in Little Rock. Actually it was Larry Miller who opened for Jerry in Little Rock.
Season 4, Episode #22 "Date Package Number Seven"
The song was "A New Beginning" by 26.
It was a symbol of common friendship between the two nations France and the US It was unveiled and opened in 1886