Virtual Nightmare is the third level in Mouseyland.
The main problem of the stage is the Henry and Gory Black combo, usually destroying any cats caught in Henry's freeze. Freeze-immune cats work nicely here, but be careful as Zang Roo can burrow through and destroy your back lines. If you can manage to sneak Awakened Bahamut into Henry's blind spot at the start of the level (with a few tanky ubers for the Gorys), this stage can be considered already won.
Cat combos required- Cool Japan and Enter the Ninja
A rich cat is also required.
Strategy- When you have around 3200 cash, spam Manic Mohawk Cat and get A. Bahamut as soon as you can. After that, summon Maglev. Don't forget to keep spawning Manic Mohawk Cat, as well as the cats of the Cool Japan combo. The use of Manic Mohawk at the start is to force the Zoges to burrow and their use near the end is to protect your base from the burrowed Zoges. The goal is to destroy the enemy base before Henry spawns. If your timing is off, Henry will spawn, and you'll be lucky to finish the stage.