If you're looking for anime similar to Sore Ike! Anpanman: Soratobu Ehon to Glass no Kutsu, you might like these titles.
The separated sisters Melonpanna and Rollpanna both befriend a mysterious horse Marin. She shows Rollpanna her treasure, a sunken ship she raises from the depths. Baikinman sees this and is inspired to build a ghost ship of his own with help from Dr. Hiyari. He also plots to turn Rollpanna fully evil in order to use her to defeat Anpanman.
Baikinsennin tells Baikinman about a magical vase called "Mekoisu no tsubo" that could grant him the power to destroy Anpanman. A princess of the perished Yaada-koku, Yaada-hime, also seeks the vase to restore her kingdom to its glory. When Anpanman joins forces with her, a furious chase ensues with both sides trying to get their hands on the vase.