So I got multiple missions asking me go to the sphinx island and I cant get on the boat, I see people go in there and im like, HOW, so I was wondering if someone couldhelp me
Actually you have to accomplish through the Map Room of the Main Quest line before you get permission to use the boat. I spent a day and a half attempting to figure that one out too...
You have to Complete the quest where you put the staff in the Map Room and that will take you to the dog next to the pool you talk to him and he will send you to the island
You have to finish the fire area of krokotopia to be able to enter the sphinx. Once you complete the Throne Room Of Fire dungeon, you might have to talk to Sergeant Major Talbot to be able to enter but i'm not 100% sure. But i know for sure that once you complete that dungeon its just talking quests till you can go in there .