Chapter 4
Dotsuki Manzai is an anthology set in the worlds of Tsukihime, Melty Blood, and Fate/stay night. Later in 2012 it received a reprint called Dotsuki Manzai Sanshin which contained previously unpublished chapters.
Chapter 19
If you thought Evangelion's characters have a tough time in the anime, wait until you see what happens when some of Japan's most unhinged manga artists get their ink-stained hands on them! Neon Genesis Evangelion: Comic Tribute is an officially authorized one-shot anthology of parody stories assaulting Evangelion from all directions. Inside, Mine Yoshizaki (Sgt. Frog) leads a band of manga pranksters including Hideki Ohwada (The Legend of Koizumi), Yun Kouga (Loveless), Nawoki Karasawa (Sake Jock, Super Cruel and Terrible Tales of Manga-ka), Yoko Sanri (B Gata H Kei: Yamada's First Time), ComiPo! mastermind Keiichi Tanaka, Rui Takato (Cynthia the Mission), Astroguy II (Queen's Blade Struggle), Kotaro Yamada (The Sacred Blacksmith), Sessyu Takemura (Domin-8 Me!), Jun Abe (Portus), and Tony Takezaki (Space Pinchy, A.D. Police). Also contains contributions from normal people, like Rikdo Koshi (Excel Saga).
Chapter 6
Soul calibur manga omake explaning the gameplay and features of soul calibur 4. From the special edition of the game.