I would say Twilight Princess is the most striking. It sounds so cool and mysterious. I still remember the chills I felt when the title was actually said during the dialogue.
Phantom Hourglass is also pleasing to the tongue and the ears.
Breath of the Wild is cool because it is such a unique, evocative phrase, it does not really have anything to do with the plot of the game either but perfectly encapsulates the game's themes and design philosophy.
Wand of Gamalon is at least fun to say.
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