Weird drawn animation on Arte in 90's, with red buble(tumor?) giving power


I’m looking for an animated little movie (10min ?). I saw it on Arte.
The kind of style for the animation is like : “Animatrix Kid’s Story”, cf youtube.

The movie itself:
A kind of bubble (tumor ?) can escape from the brain of someone and goes to the brain of someone else, and give it powers (?), or atleast a badtrip.
There is like a gouvernment trying to get back this bubble.
The movie is going fast and far, it ends with a kind of war (tanks etc), because everyone wants this bubble.
The drawn are very messy, and hand done. It was at the tv at 3h pm, the kind of things that can be shown only during the night haha