FC Barcelona B was created in 1970.
FC Barcelona Bàsquet B was created in 1997.
FC Barcelona b has been in the Liga BBVA so I assume that they have played against FC Barcelona a
Fc Barcelona
FC Barcelona Regal was created in 1926.
FC Barcelona Hoquei was created in 1942.
FC Barcelona Futsal was created in 1986.
FC Barcelona Handbol was created on 1942-11-29.
FC Barcelona Museum was created on 1957-09-24.
FC Barcelona Rugby League was created in 2008.
FC Espanya de Barcelona was created in 1905.
FC Barcelona was founded on November 29, 1899. So it was been in existence for 111 years.
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.