Complex sentence: Fender first appears when he takes some pictures of Rodney Copperbottom's first moments in Robot City, whereupon he tries to scam Rodney by saying that he must buy the photo for 50 bucks.
Split into simpler sentences: Fender first appears when he takes some pictures of Rodney Copperbottom's first moments in Robot City. Then he tries to scam Rodney by saying that he must buy the photo for 50 bucks.