《瑪利歐＆索尼克 AT 里約熱內盧奧運》（日文：マリオ＆ソニック AT リオオリンピック，英文：Mario & Sonic at the Rio 2016 Olympic Games）是任天堂於2016年在Nintendo 3DS推出的跨界體育競技遊戲，由Sega開發，屬於「瑪利歐與索尼克奧運系列」的一環。以2016年於巴西舉辦的「里約熱內盧奧運」為主題，集合來自《超級瑪利歐》與《音速小子（Sonic the Hedgehog）》系列的角色，展開融合真實奧運項目與誇張動畫風格的競技盛宴。這也是該系列第三款登上3DS平台的作品，特別強調便攜性與單機挑戰體驗。

在劇情模式方面，3DS版本加入名為「Road to Rio」的單人冒險模式，讓玩家扮演Mii角色前往里約參賽，並在途中選擇加入瑪利歐陣營或索尼克陣營。兩大陣營在各種項目上展開競爭，Mii將逐步參與不同比賽、訓練與挑戰，並透過勝利提升等級、獲取裝備與技能強化。劇情以輕鬆幽默的方式呈現，穿插系列角色的互動，包含路易吉、碧姬、音速小子、塔爾斯、納克魯斯等知名角色，並隨劇情發展開放更多支線任務與地圖區域。

操作方面充分發揮3DS的觸控、按鈕與體感混合設計。大部分項目可用按鍵操作完成，像是短跑需連按按鈕加速、射箭需瞄準與拉弓、游泳則需節奏性按鍵輸入。部分比賽也支援觸控筆滑動或傾斜主機進行體感操作。3DS特有的便攜性使這些比賽變得短小精煉，適合隨時隨地體驗。支援最多四人本地無線連線對戰，也可單人進行練習與挑戰模式。為增強遊玩深度，遊戲提供大量服裝與裝備選項，可改變Mii的能力值與外觀，讓角色根據不同項目進行專屬培養。

比賽項目方面涵蓋超過14種奧運項目，包括短跑、跨欄、游泳、射箭、足球、拳擊、體操、桌球等。每項運動都有其專屬操作方式與角色特性，使每場比賽具備不同的節奏與挑戰。此外，特別加入「Plus Events」模式，這些是將奧運項目與瑪利歐／索尼克系列特有元素結合的幻想比賽。例如在障礙賽中出現龜殼與加速板，或是射箭比賽中出現飛行敵人與特殊目標，這些設計為傳統運動注入奇幻風格，也加強系列角色的風格融入。

畫面方面，3DS版本雖然不及家用主機的細膩度，但在掌機上仍展現明亮鮮豔的視覺風格。角色建模卡通化但表現活潑，場景設計參考里約城市地標與奧運場館，融合南美熱情與動畫誇張風格，讓比賽過程既熱鬧又富視覺魅力。音效與背景音樂也配合不同比賽主題設計，節奏感與氣氛營造俱佳，能激發競賽緊張感。

市場評價方面，本作獲得玩家與媒體的褒貶不一反應。許多玩家肯定它在3DS上實現豐富的奧運項目與單人模式，尤其「Road to Rio」劇情模式為Mii角色提供成長與代入感，較前作有更明確的目標與動機。Plus Events的創意也獲得喜愛，讓遊戲不僅是模擬運動，更融合經典角色特性，提升娛樂性與變化度。不過也有評論指出部分項目操作偏簡化、挑戰性不足，AI難度波動大，有時略顯單調。此外，由於3DS硬體限制，部分比賽運作時偶有掉幀或讀取時間略長，也被認為影響遊玩流暢度。

整體而言，這是成功的跨界合作延續，提供豐富的運動項目、歡樂的角色互動與個人化成長體驗。對喜愛體育遊戲、瑪利歐或索尼克系列的玩家而言，是集競技、創意與便攜於一身的輕鬆作品，亦是2016奧運氛圍下的應景之選。

Mario & Sonic at the Rio 2016 Olympic Games (Japanese: マリオ＆ソニック AT リオオリンピック) is a crossover sports competition game released by Nintendo in 2016 for the Nintendo 3DS, developed by Sega. Part of the Mario & Sonic at the Olympic Games series, it centers around the 2016 Rio de Janeiro Olympic Games held in Brazil. Featuring characters from both the Super Mario and Sonic the Hedgehog franchises, the game presents an energetic blend of real Olympic events and over-the-top animated flair. It is the third installment in the series to appear on the 3DS, with a particular focus on portability and solo gameplay.

The 3DS version introduces a single-player adventure mode titled “Road to Rio”, where players take on the role of their Mii character and travel to Rio to compete in the Olympics. Along the way, they choose to join either Team Mario or Team Sonic, participating in various events, training sessions, and challenges. By winning competitions, Mii characters level up, earn equipment, and unlock abilities, creating a sense of progression. The story is delivered in a lighthearted and humorous tone, featuring interactions with familiar characters like Luigi, Princess Peach, Sonic, Tails, and Knuckles. As the story unfolds, more side quests and areas become available.

Gameplay takes full advantage of the 3DS’s touchscreen, buttons, and motion controls. Most events use traditional button controls—for example, mashing buttons to sprint, aiming and drawing a bow in archery, or timing button presses in swimming. Some events also support stylus swiping or tilting the system for motion-based gameplay. Thanks to the 3DS’s portability, these events are designed to be short and accessible, perfect for quick play sessions. The game supports local wireless multiplayer for up to four players, and offers both practice and challenge modes for solo play. To enhance customization and replayability, a wide variety of outfits and gear can be equipped to modify a Mii’s appearance and performance, allowing players to tailor their character for specific events.

There are over 14 Olympic disciplines featured in the game, including track races, hurdles, swimming, archery, soccer, boxing, gymnastics, and table tennis. Each event comes with its own unique control scheme and character dynamics, ensuring that no two competitions feel the same. A special highlight is the inclusion of “Plus Events”, fantastical versions of Olympic sports that incorporate iconic elements from the Mario and Sonic franchises. For instance, obstacle races may include Koopa shells and speed panels, or archery competitions might involve flying enemies and special targets. These imaginative twists inject a fantasy vibe into traditional sports, reinforcing the crossover identity of the game.

Visually, while the 3DS version doesn’t match the graphical fidelity of home console entries, it maintains a vibrant and colorful art style. Character models are cartoonish and expressive, and the environments take inspiration from real-life Rio landmarks and Olympic venues, blending South American energy with playful, exaggerated designs. Sound design is also carefully crafted, with thematic music and sound effects tailored to each sport, adding excitement and immersing players in the competitive atmosphere.

Reception to the game was mixed among both players and critics. Many praised its variety of events and the engaging single-player “Road to Rio” mode, which gave Mii characters a sense of growth and purpose, offering more direction and motivation than previous entries. The creativity of the Plus Events was also well-received, adding charm and replay value by merging sports with franchise-specific quirks. However, some critics noted that certain events felt overly simplified, with inconsistent AI difficulty and limited challenge. Others pointed out occasional frame drops and longer loading times, due to the technical limitations of the 3DS hardware, which could slightly disrupt gameplay smoothness.

In summary, Mario & Sonic at the Rio 2016 Olympic Games on 3DS is a successful continuation of the crossover series, offering a rich lineup of sports, delightful character interactions, and a personalized growth experience. For fans of sports games, Mario, or Sonic, it’s a lighthearted title that blends competition, creativity, and portability, making it a fitting and festive entry tied to the spirit of the 2016 Olympics.