Teemo is not a trollpick, he's actually a pubstomper

In Bronze/Silver/Gold he's amazing champion to carry with. He has strong early, strong mid and strong late game. He also counters popular low elo champs such as Renek, Darius, Garen, Yi, Trynd etc. Go Magic Pen build something like this ~ Nashor's, Liandry's, Sorc boots, Abyssal (If needed), Rabadon, Void Staff. You will kill squishies in Q+aa+aa and if fed enough in 2aas or 1q 1aa. Max E followed by Q, take thunderlords and mana regeneration mastery. Shroom jungle entrances and you lane. Don't forget that you can move in bush while stealthed and u get AS bonus when breaking stealth.

Sorry for unformatted post.