Metal Hippoe (メタルカバちゃん Metarukaba-chan) is an enemy that only appears in the Stories of Legend.
The Metal Hippoe is a stronger version of the regular Hippoe. Its attack rate is faster, and it has more attack power, along with an ability that only metal enemies have: taking 1 damage per hit. It has 80 health in total, with 2 knockbacks.
In some levels, Metal Hippoe can act as an annoying meatshield, such as in Chubby. B. Goode and Prison Destruction, and other times it can be a help for stalling as you build up long range cats.
A certain organization decided to experiment and make Hippoe's body metal. Appears to be weak to critical attacks.
It was reborn via the remodeling surgery of the federal government. Remodeling hippopotamus with a body of steel. Critical attacks seem to be its weakness.