I know how random this looks, but I'm looking for discussion to gather thoughts on Fire-type Pokemon. I was thinking back to when I thought Charizard and Moltres were high profile threats in ADV because teams were unprepared for them. Since Charizard could deal with Blissey, Snorlax and Tyranitar via Focus Punch and Moltres could just burn them all with Will-o-Wisp, the most consistent response for shutting them down was a bulky water. At the time I'd conceived the thought, I noticed most teams (as in I forgot Suicune existed for at least a month) would carry Swampert more often than Suicune or Milotic, thus the previously mentioned moves combined with Hidden Power [Grass] would rip some teams apart (I played victim to this a couple of times myself vs Floppy). There was also a separate occasion where I got smashed by a Sunny Day Houndoom in GSC after my Selfdestruct Snorlax got burned. With Stealth Rock introduced in 4th gen, it seems like only Heatran and Infernape escaped the fate of becoming less viable as a Fire-type. So what I am asking for is this: When are Fire-types at the pinnacle of their viability throughout each gen? What helps them to generally become threatening or more useful in any OU environment? What are the best/most viable Fire-types for each gen and why? What other issues does this type have in general that I may have overlooked?