Spark's Sprites

[SparkMouse]

Always a danger when using strong black for an outline. I know you might be thinking "I have to use black, like they do in the movie" - go look at some screenshots, they don't.

...you're definitely looking at an older version of what I posted. The only characters that use pure black at all are Porco Rosso (whom I haven't updated since I moved to colored outlines), No Face (only a partial black outline), and the Soot Sprites.

Your detail is generally good, but the line work needs fixing. The big totoro also looks a bit wrong angle and form wise. If any of this stuff is meant to be to scale it's a way off.

Specifics? "Linework needs fixing" is extremely vague and doesn't tell me anything about what to fix and on which characters.
Generally everyone is to scale as best as I can estimate since none of these characters have really shown up in each others' movies (the only character like this is the Soot Sprites). I also had to rescale a few characters just because they wouldn't work at their original or canonical size (and obviously this is not uncommon in crossover games, just look at Smash Bros). Robot is scaled down a bit, Baron was scaled up using Haru as a base (I generally figured she was about as tall as Nausicaa or San), Soot Sprites are scaled up around 2 times (Ponyo is about the same size as Mei and Mei could hold one in her hands easily, although they were slightly bigger in Spirited Away). The blue Totoro needs to be redone since I made it a lot bigger than it should've been (I noticed this after rewatching the movie a few weeks ago).

Baron's arm is also really small, even more so considering his body it tilting towards the screen.

I'll go find the reference from the movie that I used for his idle pose, will edit it in later.