During the match with Inazuma Japan, Alonso easily stopped Fubuki Atsuya's Hissatsu Kumagoroshi Zan, what's more he was even able to predict the course of the ball. He used strange technique The Boyon thanks which he created huge transparent bubble which sucked up the ball. However, later when Atsuya shot again with his brother Fubuki Shirou with their new technique Hyouketsu no Gungnir Alonso wasn't able to block it and Japan scored the first goal. Later Goujin Tetsunosuke was trying to score with his Fire Lemonade Rising and Domelgo Dominguez stood in front of the Spain's goal, blocking Alonso's view. When Goujin shot, Domelgo was pushed away and Alonso easily protected the goal. However Ichihoshi Hikaru noticed that he started to panic when he couldn't see what was going on. It turned out that Alonso was able to predict the ball's course only by looking into players' eyes. When later Goujin approached to the goal, he tricked Alonso pretending to use Fire Lemonade Rising again and suddenly Atsuya appeared from behind, scoring the second goal for Japan. Soon after Spain took an advantage when Bergamo and Luther shot with Twin Lancer. In response to this Inazuma Japan was trying to use Gouenji Shuuya's Last Resort, however it was blocked by Clario, Rufino Avalos and Domelgo and their new technique The Shelter. At the end of the match Inamori Asuto unexpectedly rushed towards the goal, dribbling through the field and Spanish defense. Alonso challenged him to shoot and Asuto dodged him, shocking everyone. Finally he managed to score the third goal for Japan and match soon ended with the result 3-3.
It was shown later that Russia defeated Spain with a score 6-0. Invincible Giant won the next match against America with the result of 2-1, which helped Japan advance to the finals.
In the dub his forename 'Salvador' refers to a name from Catalonian origin meaning saviour potentially referring to his position as a Goalkeeper whereas his surname 'Castell' like his forename refers to a name from Catalonian origin meaning castle also like his forename referring to his position.
Alonso Fibiano's artwork in Barcelona Orb uniform.