After getting the moldy cheese from the dungeon, you can use it to lure the mouse out of its hole and catch it. You then use it to feed Merlin, who follows you thereafter. He plays a role while you are battling Mordred's Robot in the end.
In Binary Bard's dream, the mouse was recreated as a slave just like Merlin; similar in a larger version with a red color scheme instead of blue. It would pop in and out of holes and grab you to try and take you away, just like the Merlin in Binary Bard's dream. But if you freeze time at the right moment, you can use him to jump above the barrier in your way.
Mechanical Mouse Blueprint
Mechanical Mouse Card
The Mechanical Mouse was included in the Super Villain Island Members-Only Evil Henchmen as a bonus item.
Although it is said to be a Mechanical Mouse, like Merlin, it has the DNA and brain of a regular mouse.
Bag of Manure | Coil of Rope | Coordiantes | Cosmic Symbols | Force Shield | Fuel Rod | Golden Coin | Ice Arrow | Island Medallion | Laser Lance | Library Book Slip | The Life of Mordred: A Cautionary Tale | Mechanical Mouse | Missing Page from Mordred's Journal | Moldy Cheese | Mordred's Journal | The Mystical Weapons of Arturus | Museum Pamphlet | Princess' Note | Secret Message | Small Key