Zelda 1 has an unused enemy type, as seen in Outlands' Second Quest Level-U (2): a Gleeok head that exists upon room spawn. It has the normal puff spawn like any other enemy. It flies around the entire room area and generally acts like any other Gleeok head. It might go more northerly than the ones in ZC, but that may be a ZC issue in general instead of a behavior unique to the single head. It also blocks sword beams, but again I am unsure if this is unique to the single head or supposed to be for all Gleeok heads. This will be used in the Outlands Module, and would also probably be fun for challenge quests like those that already give Gleeok heads hunger values.
https://www.youtube....h?v=0U-q3-_xkhA
(The glitchy graphics are only because I loaded the object in Level-1, which does not have Gleeok graphics)