I said the FLASHFIRE M Charizard takes 5 to attack. It isn't good. When will you need to hit for 300? Wailord? Wailord is slow and doesn't keep up well with today's format. That's why I said the GENERATIONS M Charizard was good but needs Trick Coin to average 200. If you're lucky, you can hit for 300 (assuming you have 4 fire attached).The trick coin and the five seemed irrelevant in play testing. The damage to self seemed to be more of a problem. I prefer the flexibility of four so I can dodge the crushing hammer setbacks.
Edit: M Charizard GEN needs a deck built around itself to work. So I suggest not running it at all as none will do any good.