There are many Coromon to encounter and catch in Coromon, but you are only allowed six in your party at one time. Early on, you are given a Patterbit with your starter. If you like the look of Patterbit and keep it, you may notice that no matter how many times it levels up, it does not evolve. This may leave you wondering if Patterbit can evolve.
The answer is yes—Patterbit can evolve in Coromon. The catch is that it does not evolve by leveling up but rather by installing a kernel into it. This may leave you wondering how to install a kernel and evolve Patterbit in Coromon.
How to evolve Patterbit in Coromon
To evolve Patterbit in Coromon, you need to install the correct kernel. Head to the house north of the Trainer Hub on Donar Island to do this. Inside you will find Julian. Speak to him with a Patterbit in your party, and he will install the kernel on it, causing your Patterbit to evolve.
Next, go to the Trainer Hub and heal your Coromon. The healing station operator will inform the kernel is pirated, and you need to have it removed. Return to Julian, who will uninstall the kernel, causing your Pitterbyte to return to Patterbit. Speak to him again, and he will install a legitimate kernel for 1,000 gold and evolve your Patterbit.
For more information on Coromon, check out When does Cubzero evovle in Coromon? and When does Toruga evolve in Coromon? on Pro Game Guides.