Steephinx, known (roughly) as "Dasmanx" (ダスマンクス,Dasumankusu?) in Japan, is a Mechaniloid sub-boss from Mega Man ZX. It appears in a secret part of the confinement facility. It originally belonged to a wealthy individual, but a month after purchase it stopped functioning and was thrown away. It has three sets of logical circuits and its parts can operate independently.
Its Japanese name is possibly a combination of Damascus steel (ダマスカス鋼) and sphinx (スフィンクス), while its English name is a combination of Steel and sphinx.