Greg responds...

Geez, top 4 Robins. How many are there? Dick, Jason, Tim, Stephanie, Damien and Carrie, if you count Dark Knight. Harper, if you count Bluebird, right? Throw in a Bat-Girl and some Batgirls, and you've got Bette, Barbara, Cassandra and Stephanie again. Then Batwoman's Kate. Nightwing's Dick again. Bette again with Flamebird. Barbara again with Oracle. Stephanie again with Spoiler. Luke. Batwing. Ace the Bat-hound. Bat-mite. Cassandra's Orphan. Azrael. Even Clayface. Wow, when you count 'em up, Batman's a protogee machine, isn't he?

And I'm sure I'm leaving some out.