>>34748876>underaged morons are already reposting this shit picture Gen 1-4 are based on modern Showdown ladder data which all see like 4000 battles a month in total.
When it was still actually being played, in gen 4 Heatran and Scizor (and Salamence when it was still allowed) battled for the #1 spot back and forth. Tyranitar wasn't the most used Pokemon even once and it definitely didn't have anywhere near 60% usage.
Sauce:
http://www.smogon.com/forums/threads/smogon-shoddy-server-statistics-december-2008.49828/http://www.smogon.com/forums/threads/smogon-shoddy-server-statistics-april-2009.54461/http://www.smogon.com/forums/threads/smogon-shoddy-server-statistics-july-2010.76550/ 