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What mental disorder does Joker have?
He has bipolar disorder type 1, most recent episode manic, severe, with psychotic features, and he also has Pseudobulbar affect.
losangeleno.com

Psychosis is characterized as disruptions to a person's thoughts and perceptions that make it difficult for them to recognize what is real and what isn't. These disruptions are often experienced as seeing, hearing and believing things that aren't real or having strange, persistent thoughts, behaviors and emotions.
www.nami.org › About-Mental-Illness

"Obsessive-compulsive disorder is a mental illness. It's made up of two parts: obsessions and compulsions. People may experience obsessions, compulsions, or both, and they cause a lot of distress. Obsessions are unwanted and repetitive thoughts, urges, or images that don't go away"
cmha.ca › documents › obsessive-co...
Obsessive Compulsive Disorder (OCD) - CMHA National

Pride can be the feeling of happiness in achieving award or successful finishing a task.
Pride can be the opposite of humble pie too. You never apologize or back down to avoid conflict. Always right.

There is a beast in man that should be exercised, not exorcised.
Anton LaVey