Sinistea antique form

[shinshin78]

There seems to be a problem with sinistea antique form
caught a phony form but gets invalid everytime i change its form to antique 

[theSLAYER]

I’m under the impression that phony and antique forms foam different areas, and also have different encounter levels?

[Atrius97]

Use the encounter database under Tools > Data to search for an Antique Form encounter. You cannot just change the form of a Phony Form one you've caught, they have different encounter conditions.