Treasure Raid is unlocked at lvl70 together with Cross Server Gyms and Z-Rings. What are you supposed to do here? Nobody knows.
But before you click away from the article, this game mode is important: it rewards you with Sparkling stones, Ambers and other materials to power up your Z-Bracelets and Z-Rings.
The reason why we mentioned earlier that "nobody knows" what we are supposed to do in this game mode it's because it's a daily game mode that starts at 13:00h, lasts for 30 minutes, and all you're doing is running in one direction clicking on rocks and other buffs that are supposed to help you, and having automatic battles with other players.
In other words, it feels like it's the most unfun mode to play, but since it provides important rewards, you can either play it on auto or you can also purchase a Treasure Raid M-Card that lasts for 30 days and it will play the mode automatically for you, without needing to have your game open.
If you want to know more about the usage of Sparkling stones, Ambers and the other materials, please check this article: Cross Server Gyms.