That chart is very confusing.
![Image](http://www.seibertron.com/energonpub/images/smilies/icon_30.gif)
Anyhoo, physical 'zard sucks, and Charizard sucks even more when it comes to competitive battling because it's weak to three (and more now) of the most common moves in the game. So by the time you dragon dance up to a decent attack stat it'll be dead from one of its horrendous trio of weaknesses, belly drum won't really help either because that'll just make it die faster. My recommendation is to drop flare blitz and breed a super "special" charmander. Go for Heat Wave over Flare Blitz or Blast Burn, since Heat Wave has no cooldown time and no recoil with only a 10% drop in accuracy. Plus it can do more damage over two turns than Blast Burn can. Give it a charti berry to protect it from rock attacks and pray you can kill your opponent before it can hit you with another one.
And if you see a water type, run. Charizard's only counter to a water type is solar beam, and they'll see that coming a mile off.