I think the only thing that Hypnosis has any major detriment to is Gengar, and it's just ANOTHER issue Gengar has to deal with among so many others.
Gengar gained:
-A special tank with equal speed, greater bulk and more attacks to tie with it and possibly KO
-Bullet Punch Scizor
-Hypnosis accuracy drop
These kill its "lead with sleep" appeal, special sweeper appeal and revenge appeal, the three main things you wanted Gengar to do on your team. It's still good; you have a lot of options with Gengar between Counter, Explosion, Scarf "surprise, I outspeed your scarf user," Will-o-Wisping and the aforementioned Destiny Bond trick, but these are all secondary to "how good" having access to a fairly accurate sleep attack on your lead was, as well as not getting prioritied/beaten in a speed tie, with using Gengar. Also lol@Heatran v. Gengar, my HP GroundGar ruins it.
A lot of the other pokemon curbed by hypnosis drop are also suffering from other issues. I think Gengar suffered the most because of them, though, as Gengar went from best lead to having to fight for team space with Lati@s, which is almost strictly better than it.
Funny story, though, the accuracy drop in Platinum has had 0 effect on in-game battles when an enemy tries to hypnosis me. /ragequit
Gengar gained:
-A special tank with equal speed, greater bulk and more attacks to tie with it and possibly KO
-Bullet Punch Scizor
-Hypnosis accuracy drop
These kill its "lead with sleep" appeal, special sweeper appeal and revenge appeal, the three main things you wanted Gengar to do on your team. It's still good; you have a lot of options with Gengar between Counter, Explosion, Scarf "surprise, I outspeed your scarf user," Will-o-Wisping and the aforementioned Destiny Bond trick, but these are all secondary to "how good" having access to a fairly accurate sleep attack on your lead was, as well as not getting prioritied/beaten in a speed tie, with using Gengar. Also lol@Heatran v. Gengar, my HP GroundGar ruins it.
A lot of the other pokemon curbed by hypnosis drop are also suffering from other issues. I think Gengar suffered the most because of them, though, as Gengar went from best lead to having to fight for team space with Lati@s, which is almost strictly better than it.
Funny story, though, the accuracy drop in Platinum has had 0 effect on in-game battles when an enemy tries to hypnosis me. /ragequit



