You don't need to lose against Mind Stinger per se. Just losing in the Mermaid Caves against anything except Sea Witch is enough. Mind Stinger adds a nasty -5 MDF penalty though, so you might want to avoid that.
You don't need to lose against Mind Stinger per se. Just losing in the Mermaid Caves against anything except Sea Witch is enough. Mind Stinger adds a nasty -5 MDF penalty though, so you might want to avoid that.