With the advent of HG/SS came a new toy for Blissey in the form of Block, which could conceivably be used to pin down a special sweeper and whittle them to their deaths while Blissey shrugs off their attacks. It hasn't yet been listed in Blissey's entry in the Strategy Pokedex (save for a small mention in the Ubers section as a strategy to remove Wobbuffet), so I thought maybe it had gone unnoticed? Or maybe Smogon analysts just haven't deemed it good enough to replace with any of Blissey's pre-existing moves?
Anyway, I've tested it just a bit on Shoddy and the results have been mixed, but not unfavorable: On the occasion that special attacker doesn't switch out immediately after your Blissey switches in, you can proceed to Block them and guarantee a kill (provided they don't carry Shed Shell, U-turn or Baton Pass, which is unlikely). The downside to this is that it usually does not work more than once as special sweepers are given even more motivation to get the hell out, having knowledge of this tactic. However, this is also a minor advantage: Threatened with Block, your opponent (no doubt mourning the loss of their mercilessly slain special sweeper) will be reluctant to stay in with another special attacker if they have one. This makes predicting the switch much easier.
Of course, there are always downsides. Running Block could force Blissey to forgo some other important support or attacking move. I've found myself frequently walled by Gengar (as he is immune to Seismic Toss and Toxic) and certain steel types if I do not carry Seismic Toss or another attacking move.
Overall, I have found Block to be a handy (if situational) tool for Blissey in testing, and I thought I'd bring attention of it to the community. I'd appreciate your feedback. :)
Anyway, I've tested it just a bit on Shoddy and the results have been mixed, but not unfavorable: On the occasion that special attacker doesn't switch out immediately after your Blissey switches in, you can proceed to Block them and guarantee a kill (provided they don't carry Shed Shell, U-turn or Baton Pass, which is unlikely). The downside to this is that it usually does not work more than once as special sweepers are given even more motivation to get the hell out, having knowledge of this tactic. However, this is also a minor advantage: Threatened with Block, your opponent (no doubt mourning the loss of their mercilessly slain special sweeper) will be reluctant to stay in with another special attacker if they have one. This makes predicting the switch much easier.
Of course, there are always downsides. Running Block could force Blissey to forgo some other important support or attacking move. I've found myself frequently walled by Gengar (as he is immune to Seismic Toss and Toxic) and certain steel types if I do not carry Seismic Toss or another attacking move.
Overall, I have found Block to be a handy (if situational) tool for Blissey in testing, and I thought I'd bring attention of it to the community. I'd appreciate your feedback. :)