First Trial is the 79th episode of the Katekyo Hitman Reborn! anime.
Lal says that they need to open a Box Weapon to pass a test. Gokudera manages to light his Flame. Yamamoto lights his flame too. Then, Tsuna can't light his flame up and Reborn helps to make it light up. Then Lal wants to make them light their flames and open the box. Gokudera tries and nothing happens and the same thing happened with Yamamoto's box. Tsuna is nervous about what will happen if he doesn't open it but Lal explains that the Sky Flame can open any box. Tsuna manages to open the box given to him by Lal Mirch to reveal an Arcobaleno Pacifier. When the base receives a SOS signal, it is found to be from Hibird.