There was this movie I loved from the 9s I can't remember what its called or much about it but I remember that there was a kid in his bed then everything started shacking an he woke up then lights went thu his windo then he went on some bulimp time thing to go to a kindom an then he meet the king who was like a kid he rode on a toy train all over the castle and the kid got a key from the king and his 1 rule was to not open a serton door or black stuff came out but the kid did an he had to save every one... CAN SOMEONE HELP ME PLEASE[email protected] if you know this movie please send it ti my email

Little Nemo: Adventures in Slumberland (1989)
From Wikipedia:
King Morpheus is the ruler of Slumberland and the Princess's father. He orders the Professor to bring Nemo to Slumberland to be his daughter's playmate. Morpheus decrees that Nemo is to be trained to be Prince of Slumberland and gives him "The Golden Key", which can gain him access to anywhere in Slumberland, provided Nemo promises not to open the door with the same symbol as the key on it. Giving into curiosity, he releases The Nightmare King!

Little Nemo: Adventures in Slumberland - Wikipedia, the free encyclopedia