That depends on what you're opponent has at the time, but I appreciate that it's often not the case. It depends on the situation, but generally I'd gladly trade 100 damage to Snorlax for a Lax Body Slam on whatever they switch in. And there's the threat of that (or Golem/Rhydon) everytime SToss Zam comes out. But they will switch in a physical for SToss Zam. An early Zam will ALWAYS lead to Chansey being brought out (or Zam dittos I guess). The main gain of this for Zam is to lower Chansey's special and then paralyse on the switch. Sure, after that you could SToss their Starmie/whatever for a neat 100 damage, but really I'd switch out before then because waiting that long is just easting up your Psychic PP. We completely agree on this point. Well, maybe not quite the last sentence, but I'll agree that SToss Zam is more effective in those first couple of turns most of the time. I think paralysis is equally bad on both Zams. With Reflect you can set it up on a special pokemon or just paralyse whatever physical is coming in (if it's not Golem/Rhydon). Jynx and Slowbro are both pretty rare, Zam is only a problem if they're running SToss and as for Starmie...Starmie will stall Zam for sure (and SToss will obviously do better versus Starmie) but it's not like Starmie is an immediate threat like Lax is for paralysed SToss Zam. Well personally probably 80% of Zams I see are running Reflect. I'd even call it the "standard moveset". I don't think SToss Zam is bad, it's just not as good as Reflect. It's main advantages appear to be a bit of extra damage in turn 2 as a lead and beating Reflect Zam in a Zam ditto.