Crush intruders with the hammerhead of BALK! BALK might be the slowest of the Flexers tribe, but this Mixel’s mallet-like head can hit, pummel and crush whatever gets in the way. All that head-butting has bashed BALK’s brain cells, so this hammer-headed Mixel can be forgetful and find it hard to spit out the right words. But there’s no one better to defend the Rubberlands, where the Flexers live, from Nixel invasions.