This guide will allow you to max out the Pet Trainer achievement much faster!
Head to the Catalogue and purchase multiple pets. When you choose the name for your pet, make sure that you name them all the same name.
Place all of the pets that you’ve bought in a room. Make sure you have enough food to keep their energies up!
Now, say any command and since they all have the same name, they’ll all be able to be trained up at the same time!