How do you get the mouses card on poptropica?

Astro Knights Island

The mouse is in the Maid's Room and is caught with cheese.

Get the gold coin from the fountain and pay your way into the Mordred Museum. Get the library slip from the stack of books. Go to the castle library (first floor right) and click the shelf Mc-M on the lower aisle. Go down the stairs into the dungeon, pull the lever, and pick up the moldy cheese. Go to the Maid's room (first floor left) and use the cheese to catch the mechanical mouse.

Super Villain Island

Use the Stopwatch to freeze the mouse near the right side wall, and use him as a stepping stone to jump the wall.