Thread:Hatebunny/@comment-24845073-20140729220418/@comment-3361105-20140730235542

Pre-Crisis is Alex Olsen, Who was created by Len Wein and Bernie Wrightson.

In 1984, Alan Moore took the new Swamp Thing book from Martin Pasko, who had written it like he was a man trying to be human, and then rewrote him within two issues as always having been made up of plant-matter. So, that's not a crisis change, that's just how the Alec Holland version's story worked out.