There is no fish. You have to get the mouse from the madian's room and feed it to Merlin. You lure the mouse with the moldy cheese you get from the dungon.
There are no cubes on Astro Knights island. There are ice floes on the Ice Planet, that you jump across to avoid the robot fish.
There are no fish on Astro Knights Island. There are Space Sharks around the Ice Planet at X-73 Y-83. To defeat them, shoot them and lure them to the Black Hole at X-85 Y-47. (see related question)
There are no bird eggs in astro knights island.
You do not get or use a bucket on Astro Knights Island.
There is no treasure chest on Astro Knights Island.
no there is not a cheat to get past the dragon on astro knights
There's a lock under the hay in Astro Knights
How do you talk to the girl in the hay loft at astro knights island?
In the library.
its in the fountain
at these coordinates X:73 Y:83
For hints only, see the Poptropica blog (related link). To see all questions about Astro Knights Island, type Astro Knights in the ask bar above. For a complete solution, see the related question.