《數碼獸訓練師：勇者訓練師》（Digimon Tamers: Brave Tamer）是WonderSwan平台上「Tamer 系列」的最終作品，由萬代推出，融合《數碼寶貝大冒險》（Adventure）與《馴獸師》（Tamers）兩大世界觀角色。以劇情推進為核心，結合數碼獸培育與回合制合作戰鬥，即使受制於掌機效能，仍以深度的劇情與跨時空設定，被粉絲視為WonderSwan時期最具代表性的數碼獸RPG。

延續前作主角城戶亮（Ryo）的冒險。他在與千年獸（Millenniummon）的激戰後原本被拋向未來，卻在本作中被意外拉回過去，並在那裡遇見新的夥伴獨角龍獸（Monodramon）。亮於旅途中得知，所有數碼世界皆源自1940年代的原始電腦 Atanasoff，並由另一台早期電腦ENIAC所共同維繫。隨著時代推移，世界逐漸分裂成多個平行宇宙，而邪惡的「最終千年獸（ZeedMillenniumon）」企圖奪取ENIAC世界，從而掌控所有現實時空。

為阻止一切崩壞，ENIAC賦予亮穿梭時空的能力，使他得以前往不同年代與維度，拯救那些遭到攻擊的世界。會見到《大冒險》中的被選召孩子、《馴獸師》世界的訓練家，甚至會遇到由敵方製造出的「帝皇獸皇帝（Digimon Emperor clone）」與「歷代戴護目鏡主角（Goggle Boys）」的複製體。亮在各個世界中與許多夥伴並肩作戰，而被他救出的孩子們會將自己的數碼獸暫時交給亮，使他的隊伍更具深度與變化。

劇情後段的氣氛急轉直下。為阻止整個系統的毀滅，ENIAC將亮送往千年獸統治的未來。在那裡，亮發現一個震撼且殘酷的事實：真正與他命運相繫的「原本的搭檔」竟是千年獸，而保護亮的獨角龍獸也因這份真相而與其爆發衝突。兩者為爭奪亮的歸屬而激戰，最終獨角龍獸選擇強行推動DNA合體，使兩者融合成一顆Digi-Egg，並預示未來孵化出的究極體將是亮在《馴獸師》動畫中真正的搭檔——鋼鐵加魯魯獸（Cyberdramon）。這段劇情讓「城戶亮如何進入Tamers世界」的謎團，在本作中正式被補完。

故事結尾，亮獲得選擇是否回到《大冒險》世界的機會。然而，他已厭倦被D-1 Tournament擺布的命運，最終決定留在《馴獸師》的現實中，成為後續動畫設定的一部分，也讓遊戲與動畫在世界觀上真正融合。

在操作面設計上，沿襲WonderSwan系列的傳統架構，以回合制戰鬥、數碼獸培育與卡片強化為主軸。地圖探索、NPC對話、劇情觸發與戰鬥均以簡潔的按鍵操作進行。遊戲最大的特色，是亮能使用來自不同世界的數碼獸。每位被救出的角色都會將自己的夥伴暫時交給亮，使玩家能在戰鬥中運用各種跨作品的Digimon，例如亞古獸、加布獸，以及來自《馴獸師》世界的基爾獸（Gilmon）等。各夥伴的能力與支援效果會隨劇情推進變化，使隊伍組成充滿驚喜。

與前作不同，本作的進化系統更重視劇情條件，而非單純累積等級即可提升。亮與其夥伴之間的情感刻劃與羈絆，是推動進化與戰鬥的重要核心，讓整個流程充滿情感重量，而不只是培育數值的遊戲。在整體設定上，大膽融入現實世界的電腦史，將Atanasoff與ENIAC置入數碼世界的起源中，使整個劇情呈現濃厚的科技與時空交織風格。跨作品角色共同作戰的設定，能同時體驗《大冒險》與《馴獸師》兩個世界的魅力；原創劇情則深入探索平行次元、數碼世界的生成、千年獸的誕生與亮與Cyberdramon的命運連結，使作品在系列中極具特殊地位。玩家普遍認為，本作成功將不同年代的世界觀整合，讓城戶亮成為貫通多個作品的重要橋樑。

在市場評價上，本作被視為WonderSwan時期數碼獸RPG的巔峰之作。劇情不但扎實而成熟，更被許多粉絲公認為系列中最富科幻色彩、最具深度的一作。跨作品角色的大量登場讓粉絲興奮，而亮與千年獸之間的命運糾葛也為遊戲帶來強烈戲劇張力。雖然畫面受限於掌機規格，但耐玩性與故事厚度使其在WonderSwan 平台上佔有無可撼動的地位，也成為眾多玩家心中最值得收藏的數碼獸作品。

Digimon Tamers: Brave Tamer is the final entry in the “Tamer Series” released for the WonderSwan platform by Bandai. The game brings together characters from both the Digimon Adventure and Digimon Tamers universes, combining story-driven progression with Digimon raising and turn-based cooperative battles. Despite the hardware limitations of the handheld system, the title is widely regarded by fans as the most defining Digimon RPG of the WonderSwan era thanks to its rich narrative and ambitious cross-timeline setting.

The story continues the journey of the protagonist Ryo Akiyama. After his fierce battle with Millenniummon, Ryo was originally thrown into the future; however, in this installment he is unexpectedly pulled back into the past, where he meets a new partner, Monodramon. During his travels, Ryo learns that every Digital World originated from the Atanasoff computer developed in the 1940s and is jointly maintained by another early computer, ENIAC. As time passes, the Digital World splinters into multiple parallel universes, while the malevolent ZeedMillenniumon attempts to seize the world controlled by ENIAC in order to dominate all realities.

To prevent total collapse, ENIAC grants Ryo the ability to travel across time and dimensions. This allows him to rescue worlds under attack, encountering the DigiDestined from Adventure as well as Tamers from the Tamers universe. He also confronts artificial threats, such as a cloned Digimon Emperor and replicas of various “Goggle Boys” from across the franchise. As Ryo aids different worlds, the children he rescues temporarily lend him their partner Digimon, giving his team greater diversity and strategic depth.

The tone shifts dramatically in the later part of the narrative. To stop the destruction of the entire system, ENIAC sends Ryo into a future ruled by Millenniummon. There, he discovers a shocking truth: Millenniummon was originally destined to be his true partner. This revelation drives a conflict between Millenniummon and Monodramon, each fighting for Ryo’s fate. In a decisive moment, Monodramon chooses to forcibly initiate DNA Digivolution, merging the two into a single Digi-Egg—foreshadowing the emergence of Cyberdramon, Ryo’s canonical partner in the Tamers anime. Through this, the game officially bridges the narrative gap explaining how Ryo transitions into the Tamers universe.

At the story’s end, Ryo is given the chance to return to the Adventure world. However, having grown tired of being manipulated by the D-1 Tournament, he decides to stay in the Tamers reality instead. This decision places him directly within the continuity of the subsequent anime, effectively merging the game’s storyline with the animated canon.

From a gameplay perspective, the title inherits the signature mechanics of the WonderSwan Digimon series—turn-based battles, Digimon training, and card-based enhancements. Players can explore maps, interact with NPCs, trigger story events, and engage in combat through simple button controls. One of the game’s standout features is the ability to use partner Digimon from various timelines. Characters Ryo rescues will lend their Digimon to him, allowing players to deploy iconic allies such as Agumon, Gabumon, and Guilmon in a unified roster. These partners also evolve or provide different support abilities depending on the progression of the story.

Unlike previous titles, evolution in Brave Tamer focuses heavily on narrative conditions rather than pure level grinding. Emotional bonds, psychological development, and the deepening relationship between Ryo and his partners play key roles in unlocking new evolutions, giving the gameplay a more story-driven and character-oriented weight.

The game is notable for openly integrating elements of real-world computer history, using concepts such as the Atanasoff computer and ENIAC as foundations for the creation of the Digital World. This gives the plot a strong blend of science fiction and metaphysical themes. The crossover structure also allows players to experience the appeal of both the Adventure and Tamers universes, while original narrative elements explore parallel dimensions, the origin of the Digital World, Millenniummon’s creation, and Ryo’s destined link to Cyberdramon. Fans often praise the game for successfully uniting multiple eras of the franchise and establishing Ryo as a key bridge connecting different continuities.

Critically, Digimon Tamers: Brave Tamer is widely regarded as the peak of Digimon RPGs on the WonderSwan. Its mature, tightly crafted storyline is considered one of the most complex and sci-fi-rich tales in the franchise. The large cast of crossover characters thrilled longtime fans, while the emotional conflict between Ryo and Millenniummon added dramatic depth. Although the graphics were limited by the hardware, the extensive narrative and strong replayability cemented the game as a standout title on the WonderSwan and a treasured classic among Digimon enthusiasts.