There have been a handful of Robins over the years, but thus far, none of them has been a bear. As this animation by Cale Atkinson proves, that's a rather large and hairy oversight.
Atkinson has made two sets of animated gifs revealing the adventures of Batman and Bear-Robin. In the first (turned into a video with the help of Bigmouth Audio), Bear-Robin gets a little too eager while taking down the Joker. In the latest installment, Batman and Bear-Robin face off against the Penguin (now a literal penguin) and his bird minions. Bear-Robin really shouldn't fight crime on an empty stomach.