Swamp Thing helps Solomon Grundy battle Superman in hopes of studying the marshland monster and finding a way to restore his own humanity. Note: It is uncertain how this event fits into post-Crisis continuity.DC Comics Presents #8 (4.79)
He battled Pre-Crisis Superman
Hell's forces splinter over the the battle against the Shadow. In Washington D.C., the darkness claims the lives of Zatara and Sargon. Where others fail, the Swamp Thing enlightens the Shadow about its own natureST2 #50 (7.86)
He battles Hell's forces, and shows them the way.
[QUOTE]Batman is morally and physically beaten by Swamp Thing.
ST2 #53 (10.86)[QUOTE]
Beats up Batman!!! HAHAHAHAHA.