Clover Heart's happened in 2003.
Hearts of Iron happened in 2002.
Plundered Hearts happened in 1987.
Rusty Hearts happened in 2011.
Vandal Hearts happened in 1996.
Fatal Hearts happened in 2007.
Shadow Hearts happened in 2001.
Shining Hearts happened in 2010.
Dual Hearts happened in 2002.
you will find it among shamrock (3 leaf clover ), it only happen one in 10.000, so good luck!
they're hearts will be complete
Kingdom Hearts coded happened in 2008.
Kingdom Hearts II happened in 2005.