The Legendary Starfy/Regional differences
During the localization process of The Legendary Starfy, various changes were made to the game so that it would appeal to North American and Australasian audiences.
This article covers regional differences in the game. For other differences relating to the game's distribution, including box and manual, see here.
Title Change
This game was originally released as Densetsu no Stafy Dairu Kaizokudan (Japanese: 伝説のスタフィー たいけつ!ダイール海賊団), literally Legendary Starfy Dire Pirate Squad in Japan. Dire Pirate Squad (English games: The Terrible Trio) refers to the group who are trying to capture Rampa (English: Bunston) under Daīru (English: Mashtooth)'s orders.
The game was released outside of Japan simply as The Legendary Starfy, presumably because it is the first game in the series to have been released outside of Japan, so the rest of the title wouldn't have been needed to differentiate it from the other four games.