Big Showdown! Sakura vs Sakuranbo!!

Synopsis

Ataru and Lum are left home alone when his parents leave for three days, and Lum locks Ataru inside of his own house! When a botched-up meal causes planes and tanks to appear instead of food, it attracts the attention of Sakura and Sakuranbo, who try to fight them off..but end up fighting against each other's summoned creatures instead!