There are no tickets to be purchased, but someone (the man in the Web Browser Cafe on Main Street) has dropped two tickets into the round trash can to the right of the tour entrance. You can dig through the refuse to find them at the bottom.
To return them to their distracted owner, take a green balloon from the Clown Store to the crying boy in the Country Side. The TV report of the incident will draw the ticket owner out of his computer game.
you get the ticket from a garbage can
When you chase him through the streets, he jumps into a boat at the dock and drops his key card. Then you can get it.
look in trash can move trash aside and you will see it.
In the bin near the tunnel entrance.
The tickets to the Underground Tour on Counterfeit Island are at the bottom of the round garbage can to the right of the entrance. Once you have them, you have to return them to their owner, who is at the Web Browser Cafe on main Street.
Go on www.youtube.com, search in counterfeit island walkthrough. It might help.
its in the open trash can in down town.
The man you give the ticket to is in the Web browser Internet cafe on main street. Go to the right and find a man with an orange beard. When you give him the tickets, he will give you one.
First go to skullduggery island,take your ship to a island called Keys World island and you will find the key of the chest on counterfeit island!;)
Find out for yourself
You find him in the clown shop.
Counterfeit Island