The Temple of Ghosts (Kung-Fu Pigs) by Keith Brumpton

Rinki - brave young noble-pig
Dinki - wise pig-tailed priestess
Stinki - battle-won samurai pig

Whenever there's danger, send for the Kung-Fu Pigs

Emperor Ping-Pong is desperate for cash - his piggy bank's down to its last million. Luckily, he learns of an ancient challenge: anyone who can survive a night in the legendary Temple of Ghosts will be rewarded with treasure beyond their imaginings.

Is the emperor brave enough to take on the challenge? Of course not! But he knows three little pigs who are... Can Rinki, Dinki and Stinki brave an entire night in the spookiest spot in the Pork-i kingdom?