Games like Natsu-Mon: 20th Century Summer Kid

If you finished Natsu-Mon: 20th Century Summer Kid, the closest matches are Eastshade, Pokémon Mystery Dungeon: Explorers of Time, Pokémon Mystery Dungeon: Explorers of Darkness, Ice Age: Scrat's Nutty Adventure and My Friend Peppa Pig. All 9 share its adventure genre and are ranked by how closely their themes and modes overlap.