Ponyville Conference

"Taking place in both the Castle of Friendship and the School of Friendship, the Mane Six, the Young Six, the Background Six, the Cutie Mark Crusaders, the governments of Equestria, the Crystal Empire, Osea, Yuktobania, Emmeria and many others, including the United Nations, knew that the How I Can Help Make the World Great ceremony is the key to an apocalyptic prophecy that has yet to pass that Trixie warned to us, which will foresee a lot of severe consequences that are waiting for us to strike."

--Su Ji-Hoon, How I Can Help Make the World Great (chapter)

The Ponyville Conference is the conference between the United Nations, the Mane Six, the Young Six, the Background Six, the Cutie Mark Crusaders, Equestria, Crystal Empire, Osea and Yuktobania, including many other factions and countries that are athat it would be held in two locations of Ponyville : Castle of Friendship and School of Friendship

It would be happened in during the USRAC War while Silbervia Conference and How I Can Help Make the World Great ceremony were being held,after Twilight Sparkle, Spike and Starlight Glimmer know about Trixie's prophecy and travel to the alternative future of USRAC War, Twilight Sparkle warned to her friends, the Young Six, Equestria, Crystal Empire, Osea and Yuktobania about the bad alternate future in USRAC War that she held this conference for discuss about their problems

Also, it would made her and the guests of Ponyville Conference must to prevent the Anti-Rubyism and How I Can Help Make the World Great ceremony even though they failed against the high-defensive security of Silbervia Conference

Security
Guests are trained with self-defensive skills from security guards, and they, along with the guards, are more well-armed than those in the How I Can Help Make the World Great ceremony. Defensive structures like watchtowers and fences were built around the Castle of Friendship and the School of Friendship. Due to all of these democratic values, dress code isn't enforced.