What do you think is dark enough to be called one of the darkest moments of the games, anime and manga? Sorry if this has already been posted. For me-
1: I think that the darkest moment in the PMD series has to be the Paralyzed Future. Specially when your team, Celebi and Groovyle are completely surrounded by enemies, and everyone has given up hope.
2: For the anime, well, most of it HAS been rather cheery, but I'd have to go with Mewtwo Strikes Back.
3: Lance, Lance, Lance all the way. Climax of Yellow chapter.