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Once you are in Mordred's secret underground lab, you should feed the mouse to the robot owl, Merlin. Next you will PUSH hard through the dirt wall on the left, and go to the back entrance to the dungeon. If you didn't throw the switch in the dungeon (in the library), you will have to go back and do it first.

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15y ago
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15y ago

The bars to the back of the dungeon cell are controlled by the dungeon switch. Go to the Mordred Museum (there's a coin in the fountain), get the library slip and open the secret passage in the castle library (Non-fiction section). Throw the switch and take the cheese. (The "dirt wall" in Mordred's lab can be pushed through.)

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13y ago

Go to the castle and enter the door to your right. On the bottom floor, click on the paperwad, go down the secret stairs, and pull the lever.

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Q: How do you open the bars that are in Mordreds underground cave on astronights island on poptropica?
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