You are having nightmares because there is something troubling you at school.
Rise of Nightmares happened in 360.
You have to make something bad happen
Anything could happen, however, for most people nightmares do not replay as waking events.
Onegai Monster happened in 1999.
Monster Lab happened in 2008.
Monster Max happened in 1994.
Monster Bash happened in 1993.
Monster Seed happened in 1998.
Monster Tale happened in 2011.
Monster Milktruck happened in 2008.
Monster Business happened in 1991.
Lil' Monster happened in 1999.