When was Smogon, Pokemon Showdown! and the tiers created?

Question

Since Smogon created the tiers most people use and Pokemon Showdown! is Smogon's official battle simulator, I assume they were created around the same time. Are they as old as Red and Blue or are they younger?

Answer 1

Smogon was first launched in December 2004. Pokemon Showdown was created in 2011 and Smogon made Showdown! their official battle simulator in July 2012.

Don't know when the tiers were made; you'd have to ask chaos or some of Smogon's other staff for that.