I'm not sure if I'm even posting this question in the right section, but:

I used the Pet Zapper v2 and I hate what I did to my pet. Is there any way I can undo this? (Change my pet to the original?)

Thanks :D

You can always buy an elixir to turn your pet back into whatever it was previously, or you can keep zapping until you get something you like. That's about it.

You can't hit a button and undo this, but you can always keep zapping until you get something you like or we also have Elixir (such as Common Wyllop Elixir that will turn your pet into a Common colored Wyllop) as well as Potions (such as Common Potion, which will turn your pet into the common color of the current species). You'll just need to figure out what pet species and color you had before :)

If you want to look at all the available colors a good tool is a website called Subetalodge. They have a pet viewer that you can see here. They are a great informational site for Subeta :)

Thank you! :D I will probably just buy the elixir to change my pet back to its original form. :)