Zebraman (2004)

Ignored by family and picked on by students, a teacher escapes into a fantasy world where he pretends he is a superhero.  Inspired by a short lived TV show he watched as a child, he makes his own Zebraman costume and ventures onto the streets at night.

The first night he hears a woman scream and stumbles upon a serial killer who has what appears to be a giant crab on his head.  As the teacher clumsily fights this villain, he discovers that somehow he has acquired the actual powers of Zebraman.

At school, he befriends a young boy in a wheelchair who is also ostracized, and by coincidence also enjoys the obscure show Zebraman.  The two team up as they deal with government agents  looking for aliens, criminals, and the alien menace itself.

I enjoyed this film, but I found myself looking at the clock since it is overly long at almost two hours.