One of the most annoying Cyclones, requiring a lot of Critical Hits to defeat. It is the slowest Cyclone, though in return its stage length is much shorter. Anti-Metal cats obtained from the other Cyclone stages (Clockwork Cat is optional though) are almost required to take down the Metal Cyclone, along with Crazed Whale Cat, Island Cat, and cheap meatshield cats. Jurassic Cat is almost useless, but Catsaurus may be of some help against this mechanical monstrosity. If you have them, Berserker Cat (Paladin fares much better but is not obligatory) will be able to deal massive damage to it and Tesalan Pasalan can famously annihilate this Cyclone with one Critical Hit. Take a look at Anti-Metal Cats for a list of all the anti-metal units.
If the player is confident in their meatshielding, they may wish to try 5 meatshields and E. Kubilan Pasalan. The 100% crit wave+crit attack will for the player to slowly wear the cyclone down while ridding themselves of the other foes.