What is it about?... Well, there is some kid (let's call him Kenny) who gets picked on day after day by a bully named Gabera. To escape reality he imagines himself on Monster Island where he meets up with Godzilla's son (whom we find out is named Minya). It seems Minya is being picked on day after day by a bully named Gabera -- HUH?! Yeah, both bullys have the same name... Go figure.
Minya and Kenny need to get up the courage to fight these bullies so how do they do it? They watch stock footage of Godzilla beating up on other monsters. That should inspire even the biggest sissy chickens to fight. Oh yeah!
Oh and I forgot to mention that Godzilla's son has the ability to shrink to kid size and then grow back to half the size of Godzilla at will. When did he aquire this new power? Who knows? Who cares?
This movie all occurs in the imagination of a small boy's mind. Nothing in this movie has any bearing on the Godzilla continuity old or new so don't worry if you decide to skip this one, I wish I had.