Egos

Egos human sized monsters are made using the heart-shapped Egos Monster Making Machine.

Beginning with episode 5 Satan Egos sent most of his "children" help in the form of giant robot duplicates, which he called their brothers (or sisters):

                  Salome claims to be the strongest woman on Earth. She carries a hand mirror which fires
                  a laserbeam.

                  Episode 21 sees little of Dinosaur Monster, two female ninja Zero One and Zero two are the main
                  villains of that episode. Dracula monster is the last monster faced by the original Miss America,
                  and the first faced by the new Miss America.

                  It is Bandage Monster who finally discovers the secret identities of Battle Fever.
                  Black Mask Monster finds a secret entrace to Battle Fever's headquarters.

                  Four Faced Monster is immune to Penta Force, Shogun Tetsuzan fights him. The human form of
                  Mr. Hyde monster was played by Toudou, Shinji star of Toei's Spider-Man who after playing the hero
                  in that series switched to playing villains.

                  Commander Hedda challanges Shogun Tetsuzan to a duel, Ogre Beard Monster is sent by Satan
                  Egos to protect Hedda from Battle Fever while Hedda tries to kill their leader.

                  After Shogun Tetsuzan defeats Commander Hedda the fallen Egos officer is transformed into
                  Hedda Monster. Hedda Monster revives three previously destroyed giant robots. The new versions
                  are more powerful than the old ones.

Egos had bat-winged planes called "Egos Fighters"

Monster names from Marc H. Miyake's Sentai Series Manual Version 2.0 ? 1995 Marc H. Miyake

Monster pictures from www.japanhero.com. Thanks Kage.