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🎮 Game Controls
Click game area to play.
- 🖱️ Mouse Aim / Interact
- WASD / ↑↓←→ Move
- Space Jump
About This Game
Introduction: "Mario Bros in Sonic World" is a fan-made ROM hack of the 1991 Sega Genesis game Sonic the Hedgehog. It runs on the original Mega Drive/Genesis hardware, not a "Flash Classic system," which is likely a misnomer for a flash cart or emulator. The hack replaces Sonic with Mario sprites and modifies the first Zone, Green Hill Zone, to feature visual elements from the Mario universe, such as blocks and pipes, while keeping the core level geometry largely intact. The visual style is a direct sprite swap, placing Mario into Sonic's world with minimal changes to the background tileset.
Gameplay & Mechanics: The sole playable character is Mario, using Sonic's base movement and physics. This means the game retains the precise, momentum-based control of the original Sonic the Hedgehog engine. Mario can roll into a ball to defeat enemies and gain speed down slopes, and the jump mechanics are identical to Sonic's. However, this creates a jarring disconnect as Mario lacks his signature abilities like fireballs or a stomp; he is functionally a visual skin over Sonic. The physics are accurate to the original game, so slopes, loops, and spring behavior feel authentic. There are no new abilities like the Insta-Shield or Drop Dash.
Key Features:
- Character Sprite Replacement: The primary modification is the complete replacement of Sonic's sprites with those of Mario, including running, jumping, and idle animations lifted from Super Mario Bros. assets.
- Modified First Zone Tiles: Green Hill Zone Act 1 features altered foreground tiles to include classic Mario elements like question blocks, brick blocks, and warp pipes, though their functionality is typically cosmetic or basic.
- Original Sonic 1 Foundation: Beyond the first Zone, the game reverts to the standard Sonic the Hedgehog ROM, with subsequent Zones like Marble Zone and Spring Yard Zone remaining visually and structurally unchanged from the original game.
