Mini Ninjas

An ancient samurai warlord returns and raises a new demonic army to subdue the world. But instead of hiring unreliable minions he transforms innocent animals into fearsome warriors. A ninja master notices how every transformation destabilizes the balance of nature, causing storms and earthquakes, and decides to send out his best ninja disciples to restore the order. When none of them returns, he is left with his last choice: the young ninja Hiro and his blunt friend Futo. (Mobygames)