Cartoons that are depressing

What cartoons make you say "Holy crap that's depressing?" 

Noozles: Adventures in Koalawalla Land had a depressing ending. 

I thought everyone died in Care Bears the Movie II until I realized I had forgotten the ending.

>>19

There were two of them.

In one Unico is involved with this guy name Toby, who's in a blue bug costume. I think he ends up working for some evil witch who turns people into material to build a castle or some shit with. There's a girl who morphs into a cat and back (Katie) who is Unico's comrade.

The other one has Unico travelling to some castle through a creepy haunted forest at the end, that's all I can remember.