What are effects of going off Abilify (aripiprazole) for biopolar imediately? Does cause anxiety, moodswings, depression? Is dangeroous just stop?

Mood stabilizers. Abrupt discontinuation of Abilify (aripiprazole) and similar medications is not advisable. If you have reason to discontinue, please seek the supervision of your healcare professional for more tolerable alternatives while tapering to discontinue abilify (aripiprazole).
Bad Idea. If you are having problems with abilify, (aripiprazole) tell your doctor and plan a safe taper off the medication and replace it with something else. It is dangerous to just stop it because it could cause all those things you asked about. It makes you much more vulnerable to depression or mania, particularly if stopped abruptly. See your doctor. They should work with you. If yours doesn't, find someone else.