Kerokero Keroppi no Bikkuri! Obakeyashiki / けろけろけろっぴのびっくり! おばけやしき

Keroppi receives a letter from a friend who is scared of an abandoned house in his new town. He and the gang go and visit him to help him feel more comfortable and overcome his fears. While exploring the house they run into some robbers and an apparition that doesn't seem to be what it is....