Kerog

Croaker (ケロッグ) is the frog robot in Bubble Man's stage. It spits out three "Petit Kerogs". Even if there are multiple large croakers, as long as at least one "Petit Kerog" is on the screen, they will not shoot any more. The "Petit Kerogs" are explosive in Super Adventure Rockman. In Mega Man: The Wily Wars, they are found in Mega Water S's stage.

Trivia

 * Kerog is a play of Kero (the sound a frog does, ribbit) and frog (フロッグ).
 * It's believed that the frog Shadow Man summons in Mega Man 2: The Power Fighters is a Croaker.

Similar enemies
Enemies similar to Croakers.
 * Croak Hopper
 * Gargarfummi
 * Kerosh
 * Mecha Kero