The theme song in it is also nice (a little sloppy)

The story is: a little boy nicknamed King Sloppy. He doesn't care about hygiene, litters and eats dirty things. The spy of the mouse kingdom, the pointed-billed mouse, took a fancy to him and threw the pill into the orange water. After drinking, the sloppy king suddenly became a villain as big as a mouse. He followed the pointed-billed mouse to the mouse kingdom. He didn't want to stay there and ran several times, but there were too many soldiers in the mouse kingdom and he was finally locked up. It turns out that the mouse king wants to dominate the earth and conquer mankind. Sloppy is their experiment to study the "secret bacteria" that destroy mankind. Xiao Sloppy is determined to escape from prison and report "secret bacteria" to people on the ground. With the help of the kind mouse, he finally found the secret map after many twists and turns. I didn't expect to be caught in an ambush set by the mouse king again, and the poor mouse was pushed down the abyss. Dr. Rat Country is happy to do experiments on the sloppy king. Because loyal cats and dogs had already stolen medicine, Dr. Rat Country ended in failure. The mouse king growled to kill the little sloppy, just as the princess of the mouse country was about to get married. The princess should make use of the talent of the slovenly king to arrange a marriage like the world for herself. Sloppy and clever, he changed the fireworks into firecrackers and blew up the mouse kingdom. He returned to the ground with his troubled kitten and puppy. King Sloppy tasted the bitter fruit of Sloppy, and he was never sloppy again.