Blasty pink thing, blasstee piiink thing...Oh that! Yeah it's all done in PSP 6.2. The trick is filters...lots and lots of filters...and layer blends. Don't ask me which ones though, 'cause I can't remember. I just play with them till it looks right.
I think I used a squooge filter to make the melty robots. Squooge = I can't quite remember what it was, but it made the robots go all squoogy.