60 different cards were in this set. Packs came with 10 different cards, one micro figure wrestler, and one playmat. Single cards have never been worth anything. Interestingly enough, I’ve come across more people who collected the figures and threw away the cards, than people who actually collected the cards themselves (probably because they are reminiscent of the successful M.U.S.C.L.E. figures in the 80s – https://www.mentalfloss.com/article/31625/brief-history-muscle-figures)
Holos were randomly inserted into packs (no ratio was given) You could also get one of the randomly inserted six cards (no ratio given) on which the name of the card was stamped with a certain color. Red stamped cards come from the packs with Terry Kenyon on the front. Blue stamped cards come from the packs with King Muscle on the front. Green stamped cards come from the packs with Kid Muscle on the front.
There were 10 different figure sculpts that could be found in either red or blue (maybe I will upload these pictures of these at some point). There were also 5 different playmats to collect.

UM-001 holo (front)

UM-001 holo (back)

UM-002 holo (front)

UM-002 holo (back)

UM-003 holo (front)

UM-003 holo (back)

UM-004 (front)

UM-004 (back)

UM-005 (front)

UM-005 (back)

UM-006 (front)

UM-006 (back)

UM-007 (front)

UM-007 (back)

UM-008 (front)

UM-008 (back)

UM-009 (front)

UM-009 (back)

UM-010 (front)

UM-010 (back)

UM-011 (front)

UM-011 (back)

UM-012 red stamp (front)

UM-012 red stamp (back)

UM-012 blue stamp (front)

UM-012 blue stamp (back)

UM-012 green stamp (front)

UM-012 green stamp (back)

UM-013 red stamp (front)

UM-013 red stamp (back)

UM-013 blue stamp (front)

UM-013 blue stamp (back)

UM-13 green stamp (front)

UM-13 green stamp (back)

UM-14 red stamp (front)

UM-14 red stamp (back)

UM-14 blue stamp (front)

UM-14 blue stamp (back)

UM-14 green stamp (front)

UM-14 green stamp (back)

UM-015 (front)

UM-015 (back)

UM-016 (front)

UM-016 (back)

UM-017 (front)

UM-017 (back)

UM-018 (front)

UM-018 (back)

UM-019 holo (front)

UM-019 holo (back)

UM-020 red stamp (front)

UM-020 red stamp (back)

UM-020 blue stamp (front)

UM-020 blue stamp (back)

UM-020 green stamp (front)

UM-020 green stamp (back)

UM-021

UM-022

UM-023

UM-024

UM-025

UM-026 holo

UM-027

UM-028

UM-029

UM-030

UM-031

UM-032

UM-033 holo

UM-034

UM-035

UM-036

UM-037

UM-038

UM-039 holo

UM-040

UM-041

UM-042

UM-043

UM-044 red stamp

UM-044 blue stamp

UM-044 green stamp

UM-045 red stamp

UM-045 blue stamp

UM-045 green stamp

UM-046

UM-047

UM-048

UM-049 (holo)

UM-050

UM-051

UM-052 holo

UM-053

UM-054

UM-055

UM-056

UM-057

UM-058

UM-059 holo

UM-060