Lore:
Teemo is a legend among his yordle brothers and sisters in Bandle City. As far as yordles are concerned, there is something just slightly off about him. While Teemo enjoys the companionship of other yordles, he also insists on frequent solo missions in the ongoing defense of Bandle City. Despite his genuinely warm personality, something switches off inside Teemo's mind during combat so that the lives he must end while on patrol do not burden him. Even as a young recruit, the drill instructors and other trainees found it a little disconcerting that, while Teemo was normally charming and kind, he turned deadly serious and highly efficient the minute combat exercises began. Teemo's superiors quickly steered him toward the Scouts of the Mothership, which is one of Bandle City's most distinguished Special Forces unit alongside the Megling Commandos.

While most yordles do not handle solo scouting missions with a great deal of finesse, Teemo is remarkably efficient at them. His record of success in defending Bandle City from infiltrators easily makes him one of the most dangerous yordles alive, though you'd never know it by having a cup of honey mead with him at his favorite inn. Bandle City chose Teemo as their first champion for the League, and he has taken to it like a duck to water. His signature weapon - a blowgun - uses a rare ajunta poison he personally gathers from the jungles of ***ungu. To help cope with his lengthy periods of isolation, Teemo recently struck up a friendship with Tristana, a fellow League champion and fellow member of Bandle City's Special Forces. This connection is healthy for both yordles, though now Valoran's voracious media outlets circulate rumors that the friendship is turning into a romantic relationship. Regardless, Teemo is a crowd favorite in the League of Legends, and a pint-sized foe that many have come to fear.


"Teemo rides a thin line between chipper compatriot and unrepentant killer, but there's no one else I'd rather have as a friend." - Tristana

Quotes:
Upon selection
"Captain Teemo on duty."
Movement/attacking
"Hut two three four."
"I'll scout ahead!"
"On my way."
"Swiftly!"
"That's gotta sting."
"Yes sir!"
Taunt
"Never underestimate the power of the Scout's code."
Joke
"Size doesn't mean everything."

Basic information:
Champion cost: 3150 ip -- 585 rp
Roles: Assassin, Support, Disabler, Haste, Farmer, Ranged, Recommended, Scout

Pros / Cons

Pros:
Hellacious damage (if you follow this build)
One of the best farmers in the entire game (yes, I am looking at Ionic Spark)
Nice early game, fantastic mid game, lethal (to the enemies) late game (if you follow this build)
Good pushing abilities
Tank destroyer
Can evolve into a fully capable assasin late game
Can give map control to his team, which determines games
Mushrooms deal very good damage
Cons:
Quite squishy (though this build has been designed with his squishiness in mind, and attempts to counter it)
Mushrooms can be destroyed by anyone who has an oracle's elixir (in fact, in ranked/normal games every roamer will have an "eye" so a good team, with a good support who destroys your mushrooms will have you crippled as far as your team utility is concerned. Oh and btw even melee champs can clear your shrooms with an oracle's, as it doesn't need someone to come close for it to detonate, but to step on it.)
Has a tendency to be focused in team fights
Low health points
If your team has a lot of ap champs, and enemies build heavy magic resistance, you may begin to have some problems.

9x Greater Mark of Insight

The reason you roll with these reds is pretty straight forward. You deal magic damage. You get little magic resistance reduction from items. So you need to find other sources of magic resistance reduction. This one's a good source.

9x Greater Seal of Alacrity

The reason you roll with those yellows(seals) is that they provide more attack speed than the blues(glyphs) with attack speed.

9x Greater Glyph of Warding


For a reason similar to the above.

3x Greater Quintessence of Insight

For the exact same reason as reds.

You need to max your Toxic Shot (E) but not asap. Take it easy. It synergises well with your on hit effects (actually that's why i build him on hit effects) but it doesn't count up if you do not have any on hit effects.
Your Blinding Dart (Q) is important but not for the damage. It's important because it helps you to counter hard attack damage carries and have some team utility apart from your mushrooms.
Your Move Quick (W) is not all that important, but it's passive is nice, and it's active even nicer. It has saved my butt countless times. The reason for that? The passive bonus is lost upon getting attacked by enemy champions or turrets. Whenever you activate the ability you get double the passive bonusses for 3 seconds and they can not be lost upon attacks from enemies. What does this mean? You can run away like a little girly while shouting "GTFO, GANKERS" xDDD
Your mushrooms Noxious Trap (R, Ultimate) are a whole chapter by themselves and will be covered
later.

The summoner spells I chose are Ghost and Ignite. The reason I choose Ghost is the fact that this along with your Move Quick renders you (almost) ungankable. Ignite on the other hand, can help you greatly with it's true damage and healing and regeneration debuff. Other viable picks might be Flash, Cleanse and Exhaust. Other spells like Heal, Clarity and Teleport or Revive are NO, NO.

Ah, our dear poisonous mushrooms. Ain't it ultra fun watching at those nuclear explosions from your spawning pool everytime an enemy steps on one? But let's face it, your shrooms are much more than damage. If you wanna play teemo successfuly, you have to learn to place shrooms at key locations so as to ward objectives in maps. Let me be more accurate. Instead of only damage, shrooms offer a small area where you can see, so that they effectively act as wards, only less powerfull, but with damage. You can also count in the fact, that every time an enemy is damaged by them, for the duration of the slow and the damage, you are granted sight of them. Now you may ask, what does this mean? Well a good teemo, provides his team with supreme map awareness by placing shrooms all over the map. Key objectives such as dragon and Baron must be warded at all times, brushes must be warded at all times and even some key objectives like the red and blue buff in the jungle. Now don't get me wrong on this one, but it's not always essential that the enemy must step on a shroom, but you can also place mushrooms in places where it will only provide vision and won't be detonated. For instance, if you play mid teemo, you may want to place them in the edge of the brush, as well as in the middle so as to have 1 mushroom for vision and 1 for damage. Also do not place shrooms (even in small) brushes right at the center of it, because good players ussually will enter a brush from it's very edge if the enemy team has a good teemo. That's not to tell you not to place mushrooms in the middle, but to place them a little bit more smartly in some brushes so that it is guarranteed enemies will be hit by them.

Get some defenses.
Get red buff whenever possible, it's one more on hit effect and it's extra cool
Remember to use your Blinding Dart on attack damage carries.
Drop mushrooms like they are hot.
Be a pain in the enemies' ***es.
Attack speed is JESUS!



Credit to: Ferrovial