King Harkinian has tried killing himself before. This is just a list.
February 16, 1958: The king wanted dinner (the first sign of a meme), but he was denied, so he tried running into a street. Failed because there were no cars in Hyrule yet.
May 3, 1960: Tried to give himself poison oak. Failed because there were no trees for miles.
November 9, 1965: Tried to drown himself. Failed because there were no bodies of water for miles, and there were no swimming pools either.
September 17, 1969: Tried to burn himself. Failed due to a new policy saying that every house has to have a pool.
March 9, 1971: Tried jumping off a cliff. Failed due to his ability to swim in air.
October 10, 1972: Tried to get AIDS. Failed because nobody in Hyrule had AIDS (at least not until 1985).
December 21, 1972: Tried hanging. Instead got electrocuted.
December 22, 1972: Tried electrocution. Instead got hanged.
December 23, 1972: Tried unplugging hospital equipment. Failed due to paralysis.
March 29, 1973: Tried angering Chuck Norris. Failed because Chuck Norris has a sense of humor.
December 30, 1979: Tried stretching his arms out. Succeeded. However, he went to the hospital.
August 8, 1981: Wandered into the Baker's kitchen, hoping to get burned to death. Failed because Hurricane Zelda doused the whole area in a tsunami.
November 26, 1990: Went to the Mushroom Kingdom and trash-talked Princess Toadstool in front of the biggest group of Mushroomers he could find. Failed because most of the Mushroomers agreed with him, causing the Mushroom Civil War.
September 2, 1992: Tried telling Stone Luigi his football was a stone, hoping Stone Luigi would throw it at him. Failed because he was actually talking to Idiotic Luigi, who just got confused.
October 11, 1993: Tried to poison himself after the release of Link: Faces of Evil. Failed because tomato juice isn't poisonous.
March 30, 1997: Tried to overdose on Taco Bell. Failed, although he did get diarrhea.
February 9, 2013: Tried going to Gamelon to anger Ganon. Failed because Link saved him.
November 22, 2013: Tried going back in time to 1963 to take the bullet that killed John F. Kennedy. Failed because Interrupting Luigi knocked him out of the way.