Juan travels around the world after stories with Luisa and Jaime and encounters lost races, treasures and so on. He also encountered assorted aliens, monsters, robots, mad scientists, wars, Aztec gods and even had a trip to Hell. The stories are full of gags with him burning his large nose whenever he uses heat vision, of him getting a bump on the head when Luisa hits him, of him hurting his fist when he hits a metal robot. As well as bees, odd-looking little yellow creatures feature in the background in some panels and are revealed as ectoplasms in the "Los Petisos Carambanales" story. He even becomes a popstar and meets the ghost of the Prado Museum. Nothing was too way out for the strips as the characters went from one crazy scenario to another.