theres a lot of evidence throughout the movie to say that the armadillo (whose name is bibo) is a god.
they first find him in the jungle, where an armadillo has no business being
they find the entrance to the city, while being followed by him
he is present when the volcano starts to erupt (previous concept art also showed him in the background actually stopping the eruption)
miguel and tulio sucked ass at the ball game, so they used Bibo as a ball. He ricocheted himself all over the place and defied physics to get into the hoop every time
they come up with the flood plan to stop cortez when bibo pushed a glass over in front of them