The Spider King is a giant spider and Apollo the Super-Pup's enemy.
During Rubble's dream in "Pups Save Apollo", the Spider King traps Apollo and the bunnies in his lair using spiderwebs. After Apollo and the rabbits are freed by the PAW Patrol, Ryder lures the king into a tar pit where he stays stuck.
The Spider King is mostly red. He has black eyes and wears a golden crown with dark orange gems on it. When seen on the Apollo TV Show, the king has green pupils and purple stripes on his legs.