FC Barcelona b has been in the Liga BBVA so I assume that they have played against FC Barcelona a
FC Barcelona B was created in 1970.
In a real match - No. Teams are not allowed to play their 'B' or "youth teams" in any professional league or tournament. FC Barcelona B actually qualified for the playoffs for the Spanish Primera Division a few years ago, but they were not allowed because the real FC Barcelona is already in that league. In addition, FC Barcelona B are not allowed to participate in the Spanish Cup, because again, the real FC Barcelona participate in that cup.
FC Barcelona Bàsquet B was created in 1997.
Tito Vilanova took over in 2012 as the new Barcelona Manager. Vilanova previously played for Barcelona's B team in 1988 and assistant managed Barcelona FC from 2008-2012.
Lionel Messi plays for FC Barcelona and the Argentina national team. He used to play for Barcelona B.
FC Nitra B was created in 1909.
Chelsea are brilliant , because the owner is a billionaire and has b ought players for big amounts. but sadly nobody has come from their youth like Arsenal or Barcelona.
FC Spartak Trnava B was created in 1923.
messi started playing at newells in Argentina then he went to Spain to try out for barcelona when he was 13 years old i think around 1996-1998