Other mistake: When Scooby and Shaggy are in the cafe, Shaggy says "Can you believe the cafe ran out of food but we're still hungry." But we can see food behind the counter.
Other mistake: In the last level, Scooby and Cyber Scooby are on the merry go round, before Scooby sneezes you can see a slight glint of Scooby Doo's collar. They are both green.
Other mistake: When both of the Velmas are in the petting zoo, the sign behind them reads "Cyber and petting zoo" instead of "Cyber Land Petting zoo"