The only way to get to Island 8 in the Pokemon FireRed game version without using any cheating devices is to use a ticket that only be obtained through a Nintendo Event. Also known as Navel Rock, Island 8 is the location where the player can catch two rare Pokemon, Lugia and Ho-Oh.
To capture the Pokemon, the player must enter the cave and then keep moving forward until he reaches a staircase. At the top of the staircase, the player can either choose to go left or right.
The path of the right takes the player to the Pokemon Lugia, which is a rare Flight/Psychic type Pokemon. The Pokemon is at level 70, which means that it will be a tough battle to capture it because it already has good defense and attack stats. At this level, Lugia has learned the moves Hydro Pump, Rain Dance, Recover and Swift.
Choosing the path on the left takes the player to the Pokemon Ho-Oh, which is a Fire/Flying type Pokemon. Just like Lugia, Ho-Oh that the player encounters at Navel Rock is at level 70 where it has learned the moves Fire Blast, Sunny Day, Recover and Swift. After the player has captured Ho-Oh, he can also obtain the Sacred Ash by searching the spot where Ho-Oh was standing.