User blog:OnePieceNation/Which of these series wouldn't you mind getting a crossover with Hunter X Hunter


 * One Piece
 * Toriko
 * Full Metal Alchemist
 * Fairy Fail
 * Naruto
 * Gintama
 * Bleach
 * Katekyo Hitman Rebon
 * Dragonball
 * Hellsing
 * Gantz
 * Berserk
 * Blue Exorcist
 * InuYasha
 * Ranma 1/2
 * Pokemon
 * Konjiki No Gash Bell
 * Medabots
 * Yu Gi Oh
 * Digimon
 * Rurouni Kenshin
 * Guilty Crown
 * A certain magical Index
 * XXXHolic
 * Tsubasa Resevoir Chronicle
 * Zero no Tsukaima
 * Yu Yu Hakusho
 * Tengen Toppa Gurren Langann
 * Steins;Gate
 * Soul Eater
 * Shaman King
 * History Strongest Disciple Kenichi
 * Beelzebub
 * Mirai Nikki
 * Hyakka Rouran
 * Hakuoki
 * Lupin III
 * Gundam
 * Macross
 * Neon Genisis Evangelion
 * Ouran High School Host Club
 * Pandora Hearts
 * Rosario + Vampire
 * Rozen Maiden
 * Saint Seiya
 * Sekirei
 * Shangri-la
 * Koihime Musou
 * The Melancholy of Suzumiha Haruhi
 * Uta Kata
 * Vampire Knight
 * Zettai Karen Children

Left out because of obvious reasons Bakuman.

I only listed animes I have seen/are watching. You are free to come up with your own unique crossovers.