Dual Hearts - 2002 VG is rated/received certificates of:
USA:T
Dual Hearts happened in 2002.
Dual Hearts was created on 2002-02-14.
Dual Alibi - 1948 is rated/received certificates of: UK:PG
Dual Citizen - 2001 is rated/received certificates of: Canada:PG (Ontario)
Dual Crisis - 2011 is rated/received certificates of: Hong Kong:I Singapore:PG
Dual Herederos del pasado - 2008 is rated/received certificates of: Spain:13
Advance Wars Dual Strike - 2005 VG is rated/received certificates of: USA:E
Heroes - 2006 II Chapter Thirteen 'Dual' 3-13 is rated/received certificates of: Netherlands:16 Netherlands:12 Netherlands:16 (DVD rating) USA:TV-14
Dual - 2002 was released on: USA: 10 August 2002 (Colfax Film Festival)
Dual Blades happened in 2002.
Dual Blades was created on 2002-10-07.
No, you cannot. There is a point in the beginning of Kingdom Hearts II, however, when you fight a boss with dual keyblades. You play as Roxas in The Mansion's basement, and you fight Axel, an Organization XIII member. You can also fight with dual keyblades when in Wisdom, Valor, Master, or Final Form as Sora (also in Kingdom Hearts II).