Originally Posted by Fat Mr.E
How many four-attack sweepers exist in GSC? Unless you count Machamp, who usually carries Curse, and Nidoking, who is really three attacks + sleep move, there aren't any and 'Zam rips both of those pokémon with STAB super-effective Psychic anyway.
There's also Ttar, who obviously rips 'Zam to shreds. Also, as I was about to post, Borat listed about 12938579 more, so yeah, 4-attackers aren't terribly uncommon.
Personally, I feel that Zam, almost guaranteed to be killed if Tyranitar is present, as well as just being utterly pounded by any attack he happens to switch in on, is not too viable. Potentially usable, but that usability is compromised if your opponent is capable of making a few key predictions and hitting Zam with an attack as it comes in. Assuming he even needs to predict in order to do that in the first place. But I've never used Encore Zam before, so I wouldn't be encyclopaedic in this regard.
And do many people use Twave on Starmie anymore? I thought it was mostly Rapid Spin + Reflect/Psychic nowadays. It's a threat, obviously, but is it a sufficiently common one among skilled players?