To go to the 3rd Sea in Blox Fruits, you need to follow specific steps. First, ensure your character reaches level 1500. This is the minimum level required to start the journey.
Next, complete the Colosseum Quest. This quest is essential and must be finished to progress. After that, you will need to defeat Don Swan. He is a challenging foe, but defeating him is necessary to move forward.
Once Don Swan is defeated, speak to King Red Head. He will provide guidance on your next steps. You will then need to battle Rip Indra until he reaches half health.
After the fight with Rip Indra, read the letter that appears. This letter contains crucial information for the next part of your journey. Finally, go to the Green Zone Dock and talk to Mr. Captain.
Mr. Captain will teleport you to the 3rd Sea. Follow these steps carefully, and you will successfully reach the 3rd Sea in Blox Fruits.