The other me (2000)

Will Browning is a slacker student who needs a good grade in science, or he has to go to a military camp for the summer. Attempting to get a good grade by ordering a product called 'Ocean Pets' for his project. Accidently, some clone formula leaked into his package. When stirring the ocean pet (and clone) mixture with a comb, he accidently creates a clone of himself. He sends the clone to school, because the clone is a lot smarter than him. Everyone likes the clone better than Will...