Hey guys! I'm GamerMatt, and well, this is my first Shaco guide. This may not be the best guide, but, it's pretty good, but remember, this is my way of building Shaco. Please, feel free to change a few things for personal satisfaction. Please feel free to leave some criticism, and good luck playing Shaco my fellow League players!

Most would say that death isn't funny. It isn't, unless you're Shaco - then it's hysterical. He is Valoran's first fully functioning homicidal comic; he jests until someone dies, and then he laughs. The figure that has come to be known as the Demon Jester is an enigma. No one fully agrees from whence he came, and Shaco never offers any details on his own. A popular belief is that Shaco is not of Runeterra - that he is a thing summoned from a dark and twisted world. Still others believe that he is the demonic manifestation of humanity's dark urges and therefore cannot be reasoned with. The most plausible belief is that Shaco is an assassin for hire, left to his own lunatic devices until his services are needed. Shaco certainly has proven himself to be a cunning individual, evading authorities at every turn who might seek him for questioning for some horrendous, law-breaking atrocity. While such scuttlebutt might reassure the native inhabitants of Valoran, it seems unimaginable that such a malfeasant figure is allowed to remain at large.

Whatever the truth of his history might be, Shaco has joined the League of Legends for reasons only he knows. He is a terrifying figure, typically shunned by both his fellow champions and the media at large. Only the summoners in the Institute of War know why such a creature was allowed into the League, but most Runeterrans suspect it to be a means that allows the power that be to keep an eye on the ever-elusive Shaco. Unsurprisingly, this champion is popular in places where madness can openly reign, such as among the power-hungry summoners of Zaun and Noxus.

Whatever you do, don't tell him you missed the punch line.

Pros:

Outputs a lot of damage
Easy to escape with
Can easily pick up kills

Cons:

Squishy
Not much AOE

Pros:

Really good ganker
Extremely high damage output
Easy escape
Can be annoying to enemy AP

Cons:

Squishy
Weak against tanks and magic resist
Hard to master

Pros:

Strong ganker
Strong early game
Strong counter-jungle

Cons:

Squishy
Teamfights are hard
Relatively slow in clearing jungle
Often banned in solo queue

Backstab (Passive) - Shaco deals 20% bonus damage when striking a unit from behind.

Shaco is the one and only champion that has a passive like this. Be sure to remember this, because when using your Deceive, you can do much more damage.

Deceive - Shaco becomes invisible and teleports to target location. His next attack is guaranteed to critically strike.
Shaco teleports nearby and becomes invisible for 3.5 seconds.

His next basic attack within the next 6 seconds will critically strike, dealing 140/160/180/200/220% damage (normal critical strikes deal 200% damage).
Cost
90/80/70/60/50 Mana
Range
500

I would say that I use Deceive more as an chasing tool for Shaco, but, can be really good for escaping also, but note, it doesn't have that short of a cooldown, so, if you use it to enter a fight, make sure you are able to stay in that fight, or you won't have an easy way out.

Jack In The Box - Shaco creates an animated Jack-in-the-Box at target location, which will wait, invisible, to Fear nearby units and attack them when some come nearby.
Shaco creates a Jack in the Box at the target location. It will become invisible after 2 seconds, and pop out when an enemy comes near, fearing nearby enemies for 0.5/0.75/1/1.25/1.5 seconds and attacking them.

Its attacks deal 35/50/65/80/95 (+0.2) magic damage and it lasts for 60 seconds while invisible or 5 seconds while firing.
Cost
50/55/60/65/70 Mana
Range
425

It's a wise idea to place your boxes where you think the enemy champion will recall towards for the fear, and the amount of damage it does. You can also use your boxes as wards if you like. Also, you can use your box to prevent being hit by skill shots, like Amumu's Q.

Good spots to place your box are:

Two-Shiv Poison - Shaco's Shivs passively poison targets on hit, slowing them and applying a miss chance to minions. He can throw his Shivs to deal damage and poison the target.
Passive: While Two-Shiv Poison is ready to cast, Shaco's basic attacks reduce the target's Movement Speed by 20/22.5/25/27.5/30% for 2 seconds. Also reduces minions' chance to hit by 20/22.5/25/27.5/30% for 2 seconds.

Active: Deals 50/90/130/170/210 (+1.0) (+1) magic damage to target enemy and reduces their Movement Speed by 20/22.5/25/27.5/30% for 3 seconds.
Cost
50/55/60/65/70 Mana
Range
625

This is a really good spell to use both the passive and active slow the target for a large amount, making it much easier to get the kill.

Hallucinate - Shaco creates an illusion of himself near him, which can attack nearby enemies. (Deals half damage to turrets.) Upon death, it explodes, dealing damage to nearby enemies.
Shaco vanishes briefly and reappears with a clone that lasts up to 18 seconds. The clone deals 75% of Shaco's damage and receives 50% increased damage.

On death, the clone detonates, dealing 300/450/600 (+1) magic damage to nearby enemies.

The clone can be controlled by holding the alt key and using the right mouse button or by reactivating this ability.
Cost
100 Mana
Range
0

This is a really good spell, because of how many things it can do. For starters, if you control your clone more like a real champion, they'll most likely target him rather than you. Also, if time right, you can dodge many things, like Blitzcrank's Q.

The three summoner spells I have chosen are Exhaust, Ignite, and Smite.

Some other good summoner spells for Shaco are Flash, Ghost, Heal, Teleport, and Clarity.

Flash is most often used as a way to escape, and can be doubled with your Deceive to do a double flash.

Ghost can be used for both chasing and fleeing, especially since you already have a personal Flash, it's more wise to use this because while stealthed, you can run at faster speeds.

Heal is mostly used only if you feel squishy, so basically, for when you are learning Shaco.

Teleport is really good because you can teleport to your boxes (that can act as a ward) and kill a low healthed champion.

Clarity is good only because Shaco runs out of mana quickly, but, other than that, I don't really recommend Clarity.

(1) - Clear Wolves *Optional*
1(2) - Clear ally Blue Golem
3A - Gank Middle lane
3B - Gank Top or Bottom lane
3C - Steal enemy Red Lizard
3D - Steal enemy Wraith Camp
3E - Continue to clear ally Red Lizard