Unlike many other toys being produced at that time, the Thundercats toy line was unique due to almost every toy having some sort of a "Battle-Matic" action. This feature, which made the toys extremely popular among children, was also employed by LJN in its previous toy line, Advanced Dungeons & Dragons.
The toys were release in three waves over a span of three years with each wave boasting new additions as well as re-releases of previous toys. Most of the toys came packaged along with a fold-out "Mini Catalogue" which advertised all the toys available in that year's release. With each new release, the catalogues were updated to include the new toys that were introduced.
Series 1 (1985)Edit
The backs of the Series 1 toy cards featured 8 figures and hence they are often referred to as "8-Back" cards.
Series 2 (1986)Edit
The backs of the Series 2 toy cards featured 6 new figures in adition to the 8 from Series 1 and hence they are often referred to as "14-Back" cards.
Series 3 (1987)Edit
The backs of the Series 3 toy cards featured 8 new figures in adition to the 14 from Series 2 and hence they are often referred to as "22-Back" cards. Most of the Series 3 toys use the back to Series 2 (14 Back). This makes collecting variants of Series 2 and reissues in Series 3 confusing.