I'm looking at Sparkstalker and thinking "What on Earth are you?". I think he looks a bit like a sort of fish monster due to the flat smooth skin but TFWiki reckons he's an insect resembling Gigan from the Godzilla films. He's mainly pinky purple with a white body, forked tail and arms.
Robot mode moves the purple to the limbs & face keeping the white on the chest. It's quite a decent colour balance which works. Both better and worse is to come....
Sparkstalker was sold in the US & UK in 1988.
This repaint was named Javil & released in Japan in 1988 as Japanese toy number D-321.
Pinky Purple becomes Clear Red
White becomes Purple
Grey becomes Neon Lime Green
Hideous. Quite, quite hideous.