Those explosions are amazing! How did they do that?

Painted perhaps?

Yeah I don't know what was the exact process, but I believe Tatsunoko had most of the "generic"/bank effects handled by the painting (or coloring?) department.
In that specific case, they also overimposed multiple layers of explosions, which creates that unique effect.

Mattyo said:
Yeah I don't know what was the exact process, but I believe Tatsunoko had most of the "generic"/bank effects handled by the painting (or coloring?) department.
In that specific case, they also overimposed multiple layers of explosions, which creates that unique effect.

You're probably correct.

I assume that is how they did it.