The 'Collab Dragon' series by Dragon Garow Lee is a 1200+ page battle doujinshi that combines both Dragon Ball and Dragon Quest. The basic premise is that a post-GT Piccolo is fighting in Hell against a combination of enemies from both series. This doujinshi was [REMASTERED](https://order.mandarake.co.jp/order/listPage/list?keyword=%E3%82%B3%E3%83%A9%E3%83%9C%E3%83%89%E3%83%A9%E3%82%B4%E3%83%B3) in 2025