《航海王：天鵝鬥技場大決戰》（One Piece Grand Battle Swan Colosseum）是由 Dimps 開發、萬代於2002年在WonderSwan Color推出的動作對戰遊戲，是家用機《Grand Battle!》系列的掌上版延伸作品。以阿拉巴斯坦篇為主要背景，將熱血、混亂又具喜劇感的《航海王》打鬥風格濃縮到掌機的2D舞台上。雖然受限於硬體性能，完全以2D角色與場景呈現，但開發團隊成功打造出極具爽快感的戰鬥系統，使之成為WonderSwan平台上最受注目的漫畫改編遊戲之一。

遊戲的故事幾乎完整取材自阿拉巴斯坦篇，從偉大航道入口到阿拉巴斯坦王國的戰役，都以事件模式穿插短劇與戰鬥來展開。玩家在事件戰鬥模式中，會按照原作故事順序依序對上不同角色，並穿插與原作一致的互動場景。例如索隆與達斯琪的相遇、路飛對上克洛克達爾的死鬥、草帽一行人與海軍的衝突等情節，都以小劇場與戰鬥連結，讓掌機玩家仍能沉浸於動畫劇情的節奏裡。

中途還會加入原作著名的半場小遊戲——拳法海獅（功夫海獅）挑戰賽，在限定時間內擊敗盡可能多的功夫海獅，作為故事節奏的調味。結束所有七場事件戰後，每位角色都會獲得專屬的結局台詞，並播放製作群名單，形成完整的故事體驗。

雖然採用2D畫面，但行動自由度相當高。角色可以走動、奔跑、跳躍、二段跳、格擋，也能拾取場景中的桶子、箱子與寶箱裡掉出的道具進行攻擊。道具分為即時生效的狀態強化物與丟擲類攻擊道具。場景中的物品、機關、背景角色都忠於原作，讓舞台充滿故事味道。

每名角色擁有約十種標準技，加上依靠能量槽來施放的必殺技。遊戲採用 Bombstock 三階段能量系統，只要攻擊命中（即使被阻擋）就能累積，能釋放一到三階段的必殺招式。這個系統讓掌機操作依然保有主機版《Grand Battle!》的爽快感。

必殺技施放時會出現特寫動畫卡片切入，還原角色高光時刻，例如魯夫施展「橡膠橡膠．加特林」，畫面會瞬間切換為動畫格，在掌機上也能感受到視覺衝擊。操作難度刻意降低，即使是動作遊戲苦手也能輕鬆使出華麗招式，使其受玩家歡迎。

一共可使用十三位可遊玩角色。起初只能使用草帽海賊團六人，隨著戰鬥累積，能解鎖阿拉巴斯坦篇的重要敵我角色，包括克洛克達爾、Mr.1、Mr.2 馮‧克雷、生長於海軍本部的斯摩格與達斯琪，甚至艾斯也在其中。每位角色附帶兩套服裝：標準服與替換色，讓玩家享受不同風格操作。

遊戲共有十個舞台，完全來自阿拉巴斯坦篇的著名地點，包括威士忌山峰、小花園、鼓之王國城堡、阿拉巴斯坦王城、鐘塔，甚至是海軍本部。舞台雖然格局差異不大，多半是視覺與背景角色的變化，但這樣的呈現對當時的掌機平台已相當豪華。

本作除了事件模式與自由對戰模式外，還加入收藏性與成長性極強的「手配書」（Treasure）系統。完成特定條件後能解鎖角色手配書，包括草帽團、巴洛克華克、王國軍、革命軍、甚至紅髮海賊團等大量角色。手配書能解鎖新角色、舞台甚至特殊攻擊，讓玩家持續有動力挑戰。

值得一提的是，本作支援WonderSwan的連線對戰功能。能以角色組隊進行「雙打模式」。不同組合會產生能力加成或削弱，加上對戰勝利後能提升懸賞金（戰鬥分數），讓掌機的對戰變得更加刺激。以掌機平台來說，這種完整的對戰與成長系統相當罕見。當年推出後，在WonderSwan社群中受到高度評價。玩家一致認為它是平台上最具完成度的對戰動作遊戲之一。雖然2D畫面相較主機版簡化許多，但仍成功保留系列特色的打擊爽感、連段表現與角色魅力。角色插圖、必殺技卡片切入等演出讓粉絲驚喜，也補足掌機畫面的限制。

在專業媒體與玩家間，普遍認為本作雖在規模上不及家用機版，但在掌機市場中極具誠意，無論角色還原度、戰鬥節奏、成長系統、收藏要素、甚至連線功能都展現出超出硬體限制的品質。唯一被批評之處是舞台互動性不足與動作變化性不如主機版，但整體仍屬系列佳作，在WonderSwan平台更是代表作之一。

One Piece: Grand Battle Swan Colosseum is an action fighting game developed by Dimps and released by Bandai in 2002 for the WonderSwan Color. As a handheld spin-off of the home-console Grand Battle! series, it condenses the heated, chaotic, and comedic combat style of One Piece into a fully 2D portable experience. Despite hardware limitations that restrict the game to 2D character sprites and environments, the developers successfully crafted a fast-paced and satisfying battle system, making it one of the most notable manga-adapted games on the WonderSwan platform.

The game’s story draws almost entirely from the Arabasta Saga. From the entrance of the Grand Line to the final conflict in the Kingdom of Alabasta, the game presents these events through an Event Battle mode that mixes short cutscenes with combat. Players follow the storyline in sequence, facing different characters as they appear in the original arc. Interactions such as Zoro’s encounter with Tashigi, Luffy’s deadly clash with Crocodile, and the Straw Hats’ confrontation with the Marines are reenacted through mini-dialogues and battles, allowing handheld players to immerse themselves in the pacing of the anime’s narrative.

Midway through, the game includes one of the saga’s iconic comedic moments—a Kung-Fu Dugong challenge, a halftime mini-game where players must defeat as many Dugongs as possible within the time limit. After clearing all seven event battles, each character receives a unique ending line before the credits roll, completing the story experience.

Although the game uses 2D graphics, movement freedom is surprisingly high. Characters can walk, run, jump, double-jump, block, and pick up items such as barrels, crates, and treasure-chest drops to use in combat. These items are classified into instant-effect status enhancers or throwable attack items. Background elements, items, and NPC cameos reflect the original manga and anime faithfully, giving each stage a sense of narrative identity.

Each character has around ten standard techniques plus special attacks activated through an energy system. The "Bombstock" gauge is divided into three tiers; landing attacks—even when blocked—fills the gauge, allowing one-, two-, or three-level Finisher moves. This system preserves the dynamic and exhilarating feel of the home-console Grand Battle! titles, despite being on a handheld device.

When a Finisher is activated, a stylish animation cut-in appears, recreating iconic moments—for example, Luffy’s Gomu Gomu no Gatling comes with a dramatic illustrated frame. Controls are intentionally simplified so that even players inexperienced with action games can easily perform flashy moves, contributing to the game's popularity.

There are thirteen playable characters. At first, only the six core members of the Straw Hat crew are available. As players progress, key heroes and villains from the Arabasta arc become unlockable, including Crocodile, Mr. 1, Mr. 2 Bon Kurei, Smoker, Tashigi, and even Ace. Each character includes two costumes: the default outfit and an alternate-color version.

The game features ten battle stages, all based on iconic locations from the Arabasta Saga—Whisky Peak, Little Garden, Drum Castle, Alabasta Royal Palace, the Clocktower, and even Marine Headquarters. While stage layouts do not differ dramatically, their visuals and background characters bring richness to the handheld’s limited display.

Beyond Event Mode and Free Battle, the game features a deep collectible and progression-based Wanted Poster (Treasure) system. By completing specific conditions, players unlock wanted posters for numerous characters—ranging from the Straw Hat crew and Baroque Works agents to Kingdom soldiers, the Revolutionary Army, and even the Red-Haired Pirates. These posters can unlock new characters, stages, and even special attacks, giving players continuous motivation to replay content.

Notably, the game supports WonderSwan’s link-cable multiplayer. Players can form tag teams for cooperative battles, with certain combinations granting stat boosts or penalties. Winning battles increases a character’s bounty (battle points), adding a competitive element to multiplayer engagements. For a handheld console of that era, such a complete multiplayer and progression system was remarkably advanced.

Upon release, Swan Colosseum received highly positive feedback within the WonderSwan community. Players widely considered it one of the most polished action fighting games on the platform. While the 2D graphics were necessarily simplified compared to the console versions, the developers succeeded in preserving the franchise’s signature impact, combo flow, and character charm. Cut-in illustrations and Finisher visuals surprised fans and helped compensate for the handheld’s technical limitations.

Critics and players generally agreed that although the game cannot match the scale of its console counterparts, it delivers an impressively ambitious experience for a handheld title. Its character authenticity, battle tempo, growth system, collectibles, and multiplayer functions were all praised for exceeding hardware expectations. Its few drawbacks include limited stage interaction and reduced move variety compared to home-console versions. Even so, it remains one of the standout entries in the Grand Battle! series and a representative title of the WonderSwan library.