Giga-Golem

Giga-Golem is the World Four boss of the original Bloo Kid. It attacks by rolling into Bloo Kid after jumping on it. Giga-Golem cannot be damaged when rolling into Bloo Kid, so after it is done rolling, Bloo Kid can jump on it to damage it. Repeated this process five more times will defeat it. The smaller variations of this boss are called Golem-Guards, which are introduced in the seventh world of the game.