Doraemon: Ken-chan no Bouken

Kenichi, a new boy who uses a wheelchair, loves butterflies but has never been able to catch one in the wild. When Nobita and Doraemon learn how much this troubles him, they invite him on an extraordinary trip 30 million years into the past, where ancient insects and untouched nature offer the adventure he has always imagined.

The prehistoric world is also far more dangerous than expected. An encounter with a gigantic bird leaves the children in trouble and separates Kenichi from his wheelchair, forcing the friends to rely on one another as they struggle to return safely from an age where even a simple butterfly hunt can become a fight for survival.