How to make a werewolf similar to woodie?

[AiZenaku]

Hey guys as someone who is completely and utterly new at coding and can only draw, how do I go about adding a keybind (like the 'z' key) that can transform the character without it being a full moon? I would like to still keep the aspect of my character changing automatically during a full moon but I want the choice whenever it's convenient to be able to fully transform.

Would it be as simple as adding a line of code? I'm planning to modify woodie's code but it's extremely complex to me and I wouldn't know what to remove or edit to make it into a werewolf. Like there are some things that are extremely beaver specific.

Thanks for reading, any help would be immensely appreciated.