Dave is a talking badger and guard on the farm where Professor Moshimo worked before he became a scientist.
Dave is a mean and strict character who gets easily angry. He shouts at the Yaks and treats them as prisoners. Therefore he is wearing a guard uniform.
He particularly hates Brainy Yak because ever since he became intelligent he was the only one who rebelled against Dave.
He only likes and respects Professor Moshimo. Dave protects and helps him when the professor has to hide from Protoboy in The Old Switcharobot. But he thinks the professor is crazy, because he still believes that Brian is not his enemy.