There is no such illness. Perhaps you are thinking of manic DEPRESSIVE. This is an illness where the person suffers from uncontrollable mood swings. Sometimes they feel so horrible they can't even get out of bed. At other times, they feel full of energy and elation.
I believe you mean Manic The hedgehog. Manic is Sonic's brother in Sonic Underground.
The word "manic" is an adjective. An example of a sentence using the word would be: The patient was beginning to exhibit manic behaviors.
bipolar affective disorder, manic, in full remission
Manic the Hedgehog is green.
Yes they are aggressive. They act reserved with strangers, but that does not mean shy.
defiantly aggressive
"Manic" is an adjective and so doesn't have tenses.
Manic Drive was created in 1996.
Montreal Manic ended in 1983.
Montreal Manic was created in 1981.
Manic - film - was created in 2001.
Manic Miner was created in 1983.