It is learned in the game that he is friends with Muss T., Fishmael, and Koover, and fishes with them. He can be seen fixing a gate at the beginning of the game, but Kammy Koopa soon appears and breaks it with a block. To break the block, Mario must use a Hammer. Later on in the game, if Mario visits Goomba Village, he can see that Goompapa fixed the gate.
"He's my dad, Goompapa. He's willing to do anything for us. We can always count on him. He doesn't look like it, though. But did you see him fixing stuff after that earthquake? That's when I knew he was cool."
"Goompapa" is a portmanteau of "Goomba" referring to his species, and "papa", another name for father.
During Chuck Quizmo's quizzes, Goompapa can be seen in the audience.