The number's significance is open to interpretation. But 108 has long been considered a sacred number in Hinduism and yoga. Traditionally, malas, or garlands of prayer beads, come as a string of 108 beads (plus one for the "guru bead," around which the other 108 beads turn like the planets around the sun).

The show is very loosely based on ancient Chinese novel the Water Margin focusing on the exploits of First Squad and Second Squad. https://www.youtube.com/watch?v=NPszteX0z7k

The Fox King is one of a few animals that wasn't fooled by High Roller's lies. The Foxes can elongate their ears to be weapons. HighRoller had to resort to having Beartstomp capture Fox King's family in order to get Fox King to obey him. He commanded Spider King and the Arachno-Tanks in battle when they ambushed Commander ApeTrully and the Tank Army in the desert. First Squad encounters Fox King and the Arachno-Tanks in a canyon where they end up in battle with each other. First Squad manages to fall back after Mighty Ray fires his electric bolts at a ridge. Upon salvaging some parts from the tanks, First Squad creates some mini-tanks to ambush the approaching Fox King and the Arachno-Tanks where the vehicles prove to be too fast for the Arachno-Tanks to attack. Lin Chung manages to knock Fox King off of the Spider King and fights him. During the fight, First Squad learns the truth about Fox King's attacks. When Fox King approaches HighRoller and Bearstomp telling him that First Squad is no longer a problem, HighRoller alters the deal. During the talk, Lin Chung and Mystique Sonia free Fox King's family. After High Roller and Bearstomp were repelled, Fox King joins Big Green (with his classification being Hero 060).

https://en.wikipedia.org/wiki/Hero:_108

Ah but it means something else as well.

Wax museum or book tour?

Not even we are sure of what's happening anymore ladies and gentlemen.