I haven't had time to make up his parents yet but he was born on February 28, 1974 in Milan, Italy. He eventually moved to Veilstone City; however, in order to compete in contests, he went to Hoenn. That's where he met Émile.
He has five ribbons: Rustboro City, Slateport City, Fallarbor Town, Lilycove City and Pacifidlog Town
He is shown to be flirty, especially around Émile (though he ignores this because he loves women). Rico is quirky, funny, intelligent and sometimes pisses other people off.
Diseases he suffers from
He suffers from anxiety, obsessive compulsive disorder and slight schizophrenia (even though these symptoms have disappeared). He is also extremely scared of heights.
He (along with Émile) was shot at least five times.
He saved Émile's life by pushing him out of the way of someone wielding a sword. It causes him to vomit and cough up blood. It barely missed his heart. Cassidy shot the wielder point-blank in the head.
Émile, in turn, saved his life. Their car had crashed and he fainted. Émile performed CPR and ended up saving his life.
He thought he had a occurrence of leukaemia but it turns out Jake diagnosed him wrong. It turned out to be a mix of arthritis, an infection somewhere, vertigo and dehydration.
He mainly uses a Glock 21, Taser and tranquilliser gun like most IP officers; however, he also has an IMI Uzi that he bought at a gun shop.
His parents and his sister are the only family he has.
Relationships with others
He had a brief relationship with Émile (about 2-3 years), until he met Cecilia. Rico was attracted to Cecilia, too, but Rico saw that Émile loved her. 
Despite being homosexual briefly, Émile has found him crying in the bathroom alone. He was most likely affected by Cecilia's death.
He eventually regains her love. He lets her sleep on his couch in his office.
As an IP officer
He is an intelligent person, capable withdrawing his gun fairly fast (not as fast as Émile, though). He is an expert on autopsies, forensic entomology, forensic astronomy and forensic anthropology. He is also an expert hacker.
Comparisons with other characters/people
He is somewhat based on Danny Messer (played by Carmine Giovinazzo) and Don Flack (played by Eddie Cahill) of CSI: NY. However, his wittiness can be compared to Tony DiNozzo (played by Michael Weatherly) of NCIS.