|Location||Brooklyn, NY (formerly), Mushroom Kingdom (currently)|
|First Appearance||Super Mario Throwback|
|Mushroom Kingdom, Toads, Mario, Luigi|
|Family and Relations|
| Mario (brother) |
Alfonso is an all in kind of guy, he willingly helps Mario and Luigi rescue Peach and geos on adventures with his bros. He never backs down from a challenge, and often is journeying through the Mushroom Kingdom. He was only 10 when Mario and Luigi went missing after a plumbing job in Brooklyn, and does not want them to go missing again. Alfonso is a very brave person, proving his bravery to be greater than his brother Mario at times.
Alfonso appears in Super Mario Throwback as a default playable character.