I believe the second image was submitted to BABD ages ago and I never got around to come up with commentary.
The thing is, Codename: Kids Next Door, as a cartoon with a silly premise played up to 11, has a sense of self-awareness.
In a show that has characters named Count Spankulot or Toilenator, bras that transform into armor (boobplate included, of course!) are well within the realm of possibility.
Not so much in fantasy/sci-fi settings that otherwise take themselves seriously.
Another advantage KND’s bra armor has over all that “mature” media that has battle bikinis? Boys wear it too, boobplate and all.
~Ozzie