Treasure Island

Treasure Island is an adventure novel by Scottish author Robert Louis Stevenson, which has been adapted into the following anime.
 * An anthropomorphic version titled was produced by Toei Animation and premiered on March 20, 1971.
 * A Japanese TV series co-produced by TMS Entertainment and Madhouse aired on Nippon TV channels from October 8, 1978 to April 1, 1979, followed by a compilation film which premiered on May 9, 1987.
 * It became the basis of Nobita's Treasure Island, the 38th Doraemon film in March 2018.

Plot
Jim Hawkins is a young boy led by progressive events to embark on a search journey for the legendary treasure of the once dreaded pirate, Captain Flint. On their way to Treasure Island, John Silver, Jim's best friend (and eventually father-figure), takeovers the ship revealing his true self as the ruthless pirate who was once the right hand of Flint himself. Feeling betrayed, now Jim has to deal with his mixed emotions and face Silver who still considers himself and Jim friends.