They are...

BOLD!... They are smart!...They are skillful!...They are strong!...

They are THE CHALLENGERS OF THE UNKNOWN!

Cover for Challengers of the unknown archives volumen 1

So, I discovered these characters in one episode of the animated series "BATMAN: THE BRAVE AND THE BOLD". I really like how they presented them. So I started looking for some illustrations of these guys, and made this.