《From TV Animation ONE PIECE～虹之島傳說～》是以《航海王》動畫為基礎製作的角色扮演作品，以「偉大航路篇（Grand Line）」做為故事主軸，並讓玩家以全新的原創主角身分加入草帽海賊團，一同展開冒險。遊戲的核心賣點，就是讓喜歡魯夫與草帽一行人的粉絲，能夠真正成為夥伴之中的一員，與他們一起旅行、戰鬥、交談，並親身融入動畫世界的節奏與情感。

故事從玩家在羅格鎮邂逅草帽海賊團開始，原作中的場景與劇情橋段大量被收錄，包括動畫裡的經典時刻，也加入許多遊戲原創事件。最具代表性的新增元素，是旅程中出現的一支神祕海賊團，以及前往「虹之島」所需蒐集的三個證物。整段劇情並非單純重現原作，而是以動畫為基礎延伸出全新的冒險，因此即使熟悉《航海王》的粉絲也能享受意料之外的故事鋪陳。

遊戲十分重視角色之間的互動，可自由與草帽海賊團成員交談，並透過對話與事件發展加深彼此的羈絆。魯夫爽朗、直率又激勵人心的台詞在遊戲中特別突出，他永遠向前看的精神，讓劇情中充滿熱血與感動。索隆、娜美、香吉士、烏索普等角色都維持原作的個性特色，與玩家的交流也讓整段旅程更加生活化、有臨場感。

玩法方面，最大的特點是特別為航海王的熱血與混亂節奏量身打造的「吹飛轟轟戰鬥（ふっとばしガンガンバトル）」系統。這是一種最多三對三的指令式團隊戰鬥，雖然使用回合制指令操作，但戰鬥視覺與節奏相當動態。角色施展必殺技後，若把敵人擊飛，而其落點剛好有其他敵人，則會將對方一併撞飛，形成連鎖的「撞擊反應」。相反地，如果擊飛後落在我方角色附近，便會觸發隊友的追加追擊，形成像動畫那般戲劇化又具速度感的戰鬥連段。

這種設計十分契合《航海王》原作誇張的身體動作與搞笑節奏，視覺效果也極具魯夫式的「熱血亂鬥」味道。此外，角色施展特殊招式時會出現大幅插圖畫面，讓粉絲能欣賞到角色的專屬演出，也提高戰鬥的爽快感與收藏價值。當年推出時還附贈原創卡片（卡片達斯）作為首批特典，對於收藏玩家而言具有一定吸引力，也展現官方希望粉絲能把遊戲與周邊一起收藏的企圖。

就市場與玩家評價來看，本作屬於典型的粉絲向作品，最主要的亮點並非系統深度，而是讓玩家「成為草帽一員」所帶來的沉浸感。遊戲畫風、氣氛與角色呈現方式都忠實傳達動畫氛圍，戰鬥系統雖然偏簡單，但具備鮮明特色，尤其是敵人與我方之間互相撞擊所造成的連鎖反應，讓戰鬥畫面充滿變化與娛樂性。部分玩家認為劇情節奏稍微直線、戰鬥較依靠演出，但整體來說，本作在粉絲群中獲得頗佳回響，主要因為它成功再現《航海王》原有的情感、幽默與團隊精神。

整體而言，《ONE PIECE～虹之島傳說～》是以粉絲體驗為核心的作品，透過大量原創與動畫再現內容，使玩家真正融入草帽海賊團的世界。雖然系統深度不如傳統RPG，但在角色魅力、劇情演出與「成為夥伴」的代入感方面，仍展現相當獨特的吸引力，是喜愛《航海王》的玩家值得回味的一部作品。

From TV Animation ONE PIECE: Legend of the Rainbow Island is an RPG based on the One Piece anime, focusing on the “Grand Line” arc and allowing players to join the Straw Hat Pirates as an original character. The game’s biggest appeal lies in granting fans the chance to truly become one of Luffy’s companions—traveling, fighting, chatting, and experiencing the world of the anime from within the crew.

The story begins in Loguetown, where the player—appearing as a new, original protagonist—encounters Luffy’s crew and gradually becomes their trusted partner. The game recreates many classic moments from the anime while also adding a large number of original events. The most notable additions include a mysterious pirate crew that appears during the journey, and the quest to collect three special emblems required to reach the fabled “Rainbow Island.” Rather than simply retelling the anime, the game expands upon it with a new adventure, giving even long-time One Piece fans new experiences.

A major part of the gameplay emphasizes interaction with the Straw Hat Pirates. Players can talk freely with Luffy and the others, deepening bonds through conversations and events. Luffy’s energetic, warm-hearted lines are particularly memorable, delivering the same motivational feeling found in the anime. Zoro, Nami, Sanji, Usopp, and the rest retain their signature personalities, making the adventure feel lively and authentic as players build real camaraderie with the crew.

The game’s most distinctive system is the “Smash-Bang Battle” (ふっとばしガンガンバトル), designed specifically to recreate the chaotic, fast-paced brawling style of One Piece. These battles are three-on-three, command-based team fights. Although the controls follow a turn-based format, the visuals and rhythm of combat feel dynamic. When a character uses a special move to knock an enemy flying, and that enemy crashes into another opponent, the secondary target is also sent flying—creating a chain-reaction collision. Conversely, if the knocked-back enemy lands near one of your allies, your teammate automatically follows up with an additional strike.

This system mirrors the exaggerated physical comedy and wild action of the original anime, and its flashy visual presentation matches Luffy’s “chaotic hot-blooded” style. Special moves also trigger unique full-screen illustration cuts, giving fans a chance to enjoy character-specific highlight moments and enhancing the excitement of combat.

The initial release included an original Carddass card as a limited bonus, appealing to collectors and reinforcing the game’s connection to official One Piece merchandise.

In terms of market reception, Legend of the Rainbow Island is widely viewed as a fan-focused title. Its strengths lie not in deep mechanics but in immersion—allowing players to truly feel like part of the Straw Hat crew. The game successfully reproduces the anime’s atmosphere, humor, and emotional tone. While the battle system is relatively simple, it has a strong identity, especially with its chain-reaction collision mechanics that make each fight lively and theatrical. Some players felt the storyline is linear and that combat relies heavily on presentation, but overall, the game received positive feedback from fans for faithfully capturing the spirit of One Piece.

In conclusion, From TV Animation ONE PIECE: Legend of the Rainbow Island is an RPG built around fan experience, combining new original story elements with recreated anime scenes. Although it may not offer the mechanical depth of traditional RPGs, it shines in its character charm, engaging presentation, and the unique joy of becoming an actual companion to the Straw Hat Pirates—making it a memorable title for One Piece fans.