To summon the Eye of Cthulhu in the game "Terraria," you need to have at least three NPCs living in your world. Once you meet this requirement, you can craft a "Suspicious Looking Eye" at a Demon or Crimson Altar using six Lens. Use the Suspicious Looking Eye at night to summon the Eye of Cthulhu, which will then appear as a boss for you to defeat.
Cthulhu was created in 1928.
There is not exactly a best weapon but shruikens are recommended. I am not sure I spelt shruikens correctly
Pimoa cthulhu was created in 1994.
The Trail of Cthulhu was created in 1962.
Crypt of Cthulhu ended in 2001.
Crypt of Cthulhu was created in 1981.
The Mask of Cthulhu was created in 1958.
Acolytes of Cthulhu was created in 2001.
Cthulhu's Reign was created in 2010.
The Spawn of Cthulhu was created in 1971.
Cthulhu Cultus ended in 2001.
To summon all bosses in Terraria, you'll need specific items for each one. For example, the Eye of Cthulhu is summoned using a Suspicious Looking Eye at night, while the Eater of Worlds requires the Worm Food or breaking a Shadow Orb in the Corruption. Other bosses like the Skeletron can be summoned by interacting with the Old Man at the Dungeon at night, and the Wall of Flesh is summoned by using a Guide Voodoo Doll in the Underworld. Each boss has unique summoning requirements, so be sure to gather the necessary items beforehand.