Recently started using this in my server and found that there are only modifiers for growth and shiny. Is there a way to see other modifiers/add my own?

There are more modifiers. You can get a list of all available modifiers using /pokemodifier Currently the available modifiers are: gender, growth, nature, pokeball, and shiny, with the possibility of more in the future

Oh cool, guess I just missed trying to do that before asking a question. Is there any way to add my own? Or is it just as-is?