Much of the sixth season of Rumiko Takahashi's "Feudal Fairy Tale"Inu Yashahas a lighter tone than the previous instalmments.   Insanity reigns when the dried demon parts Kagome unwittingly brought into the present day are reconstituted during her school cultural festival. Inu-Yasha, his ears hidden beneath an incongruous baseball cap, destroys them--while making mincemeat of Kagome's class play (an episode that recalls the performance of "Romeo and Juliet" inRanma 1/2). Fox-spirit Shippo begins to come into his own as a character, claiming a bigger role in the story and arguing with the powerful Inu-Yasha. In the main story line, Naraku has collected all but four of the shards of the sacred Shikkon Jewel: wolf-demon Koga holds two; Sango's possessed brother Kohaku has the third. The fourth is caught between the realms of the living and dead, near the tomb of Inu-Yasha's father: But only the dead can cross into that world.   Naraku searches for the path to the shard using Kagura and Hakudoshi, the repulsive avatar he created from his human heart (the heart of Onigumo, the thief who loved Kikyo decades earlier). These episodes offer plenty of action, including a battle with the firey horse-demon Entei and his ugly master Rengokuki. The filmmakers begin to draw the strands of the plot together for the seventh and final season: Miroku and Sango admit their affection for each other, and Inu-Yasha realizes that Kagome's influence has cooled the desire for power that once consumed him. The Deluxe Edition comes with an Inu- Yasha watch. (Rated "Teen:" suitable for ages 13 and older: violence, grotesque imagery, alcohol use, brief nudity)--Charles Solomon(127. Don't Boil It! The Terrifying Dried-Up Demon! 128. Battle Against the Dried-Up Demons at the Cultural Festival! 129. Chokyukai and the Abducted Bride, 130. Shippo's New Technique, The Heart Scar!   131. Trap of the Cursed Wall Hanging, 132. Miroku's Most Dangerous Confession, 133. The Woman Who Loved Sesshomaru Part 1, 134. The Woman Who Loved Sesshomaru Part 2 (special), 135. The Last Banquet of Miroku's Master, 136. A Strange Invisible Demon Appears! 137. An Ancestor Named Kagome, 138. Mountain of Demons: Survival of the Duo, 139. The Great Duel at Shoun Falls! 140. Eternal Love, The Naginata of Kenkon, 141. Entei, The Demon Horse Unleashed! 142. Untamed Entei and Horrible Hakudoshi, 143. 3,000 Leagues in Search of Father, 144.   Hosenki and the Last Shard, 145. Bizarre Guards at the Border of the Afterlife)