If you liked the Buta anime, the Anime-Planet community thinks you'd like:
When the pirate cat Flint leaves young Jim and his mouse companion Gran a map to Treasure Island, the two find themselves swept up in a glorious adventure. On the high seas the duo encounters sea creatures and destroyed ships galore; but most importantly, they find themselves prisoners aboard the ship of the dreaded Long John Silver. Alongside Kathy, Flint’s granddaughter, Jim and Gran will brave violent storms, try to keep the map safe, and ultimately try their best to find the treasure before their captors do first!
Family friendly, animal protagonist laden titles about a grand adventure with plenty of pirates along the way. Animal Treasure Island is the FAR superior of the two, but fans of one will appreciate the other.
When the loveable Perro was banished from the kingdom of cats (for the treacherous crime of saving a mouse!), his wanderings led him to the house of Pierre, a young lad who was mistreated by his greedy brothers. Thrown out in the cold, the duo then traveled to a great kingdom where they laid eyes on the princess Rosa, who soon would be wed to a wealthy suitor. Who best to marry her but ... the son of a poor farmer?! With Perro's help, Pierre might just stand a chance -- that is, if he can fool the royal family and defeat the evil Lucifer, who wants Rosa all for himself!