If ever there was a Ace Attorney/Ghost Trick crossover, I’d imagine it something more like Investigations. More than one terrible person like Kristoph or Dahlia in the universe probably has a bone to pick Phoenix and friends, so they’d probably wind up murdered. Except not really because, oh hey, ghost tricks. So the attorney’s team up with ghosts for some reason to figure out who the killer(s) is, only to discover that maybe some not so friendly ghosts on the killer’s side are also using tricks of their own to keep them dead. Bonus points for spirit mediums allowing ghosts to take temporary human forms.