How do you get the 99 merch code on Pet Simulator?

As a cryptocurrency and finance professional, I don't typically dabble in gaming codes or virtual pet simulators. However, if we're to approach this question from a logical perspective, typically obtaining codes in such games involves either in-game achievements, community events, or special promotions. So, to simulate a questioner's tone on how to get the 99 merch code on Pet Simulator, I would ask: "Hello, I'm wondering if you could provide some insight on how to acquire the elusive 99 merch code in Pet Simulator? I've been playing the game for quite some time, but have yet to uncover the secret to unlocking this particular code. Is it a hidden achievement? A reward from a community event? Or perhaps a code that's distributed through special promotions? Any information you could share would be greatly appreciated.