About Great Bomber.. He has two big, yellow eyes that are nothing like human ones! It's weird, he's froggy, haha! He does not look like a frog on his art, but the pixel art of his face in Battle Mode really looks like one to me.

Pretty Bomber's stage, for instance, is called "Bukubuku Sutaa" (ブクブクスター), although I have no idea what "Bukubuku" could mean in this case. It is "loose-fitting" or "baggy (clothing)", but... On the European translation (which is usually fidel to the original, for Bomberman at least) it is called "Deep Sea", but if it was that, it would be called "Enkai", "Shinkai" or "Enyou". I can only suppose that it is a pun of some kind, maybe on the sound made by the sea. Dunno.