How to get a rare pet

first you need spikes for small pets like the grasshopper, if your trading for a big pet like the seal  you need black longs headdresses etc, if the jammer declined your trade, don't worry!, you can add! if the jammer declined the add and you like the pet you can create one and get codes (you can't really create rare pets anymore the only pets that are obtainable are the firefly the grasshopper ladybug praying mantis) you couldn't get bears anymore.