>>32826135>Gen 1>Great Special and Immunity to one of the most common types>Gen 2>Hits everything hard and can force out snorlax with Perish Song>Gen 3>Diverse with the same anti-stall sets and could easily switch in more. That and can also work well as a status user>Gen 4Same as Gen 3, but can now use STABs and a Fighting type special attack, as well as being a spin blocker
>Gen 5Same as Gen 4, but wasn't as impactful due to Stall being only on Rain teams
>Gen 6A good change (Steel types losing there Ghost resist so that it didn't rely on Focus Miss all the time and Mega Gengar) and a bad change (Knock off being buffed)
>Gen 7>Can't switch into Earthquakes anymore, but it's cool since Fairies forced out most of the Dark types and Gengar can also hit Fairies hard with Sludge Bomb/Wave