Godzilla & Minilla All Monsters Attack

[edit] Plot
Ichiro is a highly imaginative but lonely latchkey kid growing up in urban Tokyo. Every day he comes home to his family's empty apartment. His only friends are a toymaker named Shinpei Inami and a young girl named Sachiko. Every day after school, Ichiro is terrorized by a gang of bullies led by a child named Gabara. After seeing Godzilla attack the docks of Tokyo, to escape his loneliness, Ichiro goes to sleep and dreams about Monster Island, where he befriends Minilla, the son of Godzilla. During through parts of the adventure, they both watch Godzilla battle monsters such as Ebirah, Kamacuras, Kumonga, and the Giant Condor (also known as Condra).

Through these adventures, Ichiro watches as Minilla deals with his own bully, a monster also named Gabara. Godzilla sees this happen to Minilla. To train Minilla, Godzilla makes him fight. Then Ichiro helps Minilla fight back at Gabara and wins through some help of Godzilla. It is through these trips that he learns how to face his fears and fight back. These lessons also grant him the courage to outwit two bumbling bank robbers, as well as have the guts to stand up to Gabara and his gang in a final confrontation.

I like how it has a happy ending & it's child like behavior