Dai-Satan was the true leader of this group. He was also the final villain the Rangers destroyed.
Lokar was just one of Rita's monsters, who did not held any power over her.
Were imprisoned on the planet Nemesis.
Were imprisoned on the moon.
All members were sealed in a prison once again, which was launched into space.
Only Rita Repulsa was sealed in a space dumpster while the others continued working for Lord Zedd.
This group was finally defeated when it was hit by Zordon's energy wave, which either purified some members, turning them into humans, or destroyed them.
Most monsters are clay constructs made by Pleplechaun which are based on magical beings who lived on prehistoric earth. Several others are in fact neutral creatures who are either forced to work for Bandora or led to believe the Zyurangers are their enemies.
Most of the monsters are clay constructs created by Finster while others are created by Rita's own magic, none of which are explicitly based on anything.
Master Vile and Rito Revolto were Rita's father and brother respectively. Rito joins this group by the third season while Master Vile temporarily aligns himself with the group while searching for the Zeo Crystal.