Kaiketsu Zorori - Season 1 Episode 14 The Mysterious Airplane

As Zorori plays with a toy plane, he remembers his father who left him and his mother years ago to pursue his dreams of flying the skies in a plane he built himself. An officer comes by and tells him the toy plane was stolen and the boars said they took it by mistake. They run from the police and end up on Money's plane, but partway through the flight the plane has engine trouble and crashes into a snowy mountain. Zorori builds a new plane from the remains and they fly off. They are low on gas when a red plane comes out of nowhere and points them to a nearby city. The red plane quickly vanishes and they get Money back home safely. Zorori is left wondering if the pilot was his father. Based on book 16.