MONSTER UNDER THE BED.Wot is the movie with the boy out of boy meets world and the are monster under his bed and they take his brv and he has to go and get him back .
One of the monsters is nice to him and helps him and a girl he likes in school helps him to.
The monster don't like the light s.
It's a kids film .

Little Monsters (1989) (http://www.imdb.com/title/tt0097758/)

I agree with Quinn F - but I'm pretty sure it wasn't the boy from Boy Meets World - (Ben Savage), it was his older brother Kevin, from The Wonder Years. Embarrassing enough - Kevin Savage was my first crush... I remember watching Little Monsters and Princess Bride like a thousand times (and every episode of The Wonder YEars!) :}