Watch the Whole Movie!
When you absolutely must rescue your vague kingdom from a usurper with unknown motivations and restore your position as the supreme ruler of the lands, reach for a Galgameth statue and squirt some tears on it. Just make sure you don't ever go near an ocean. It's the Adventure or Legend or just Galgameth and he's one family friendly Kaijū!
Galgameth is one of those movies that has no target audience. It's too dumb and childish for adults but has too many adult themes for little kids. The protagonist is a pre-teen but there's too much cutesy stuff to fit that demographic. It's like there's a 2 week window when a boy is about 11 and isn't sure if they should be kissing girls or playing with action figures that this movie might work for.