How do you get all the secret island tickets in Pokemon emerald?

You can't get "secret island tickets" in Pokemon Emerald. This is a feature from Pokemon Ruby and Sapphire, where specific tickets allow access to different islands.

Pokemon Emerald does have a different system for accessing islands:

* The Battle Frontier: You can access the Battle Frontier after defeating the Elite Four and Champion.

* The Sevii Islands: These islands are accessible after beating the Elite Four and Champion, but require a special item called the "Old Sea Map" to navigate.

Let me know if you have any other questions about Pokemon Emerald or other games in the series!