Super Mario Bad Time Duo

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Deltarune

Jevil Fight

Berdly Fight

Queen Fight

Jevil Fight 2-Player

Bad Time Trio Simulator OG 2 Player

Swift Bad Time Trio

Undertale Last Breath

Swap Time Trio

Bad Time Simulator Horrortale

Horrortale Sans Fight

Inktale Sans 2-Player Battle

Underfell Sans Fight

Undertale Sans Fight

Endless Sans

Sans Fight Simulator

AU Trio Fight

Mouse Control Bad Time Simulator

Gaster Fight

Undertale Music Player

Lucas Battle

Sir Kain Battle

Friday Night Funkin vs Sans

Super Mario Bad Time Duo | Mario Bros Sans Fight Simulator Challenge

Released:June 11, 2025

🎮 Basic Controls: Arrow keys control your SOUL

🔥 Mario Attacks: Dodge flaming projectiles that replace traditional bone attacks

⚡ Luigi Attacks: Navigate electrical patterns with precise timing

⚠️ Critical Warning: Luigi's attacks become instantly lethal at 1 HP

🎯 Luigi Danger Zone: When your HP drops to 1, Luigi switches to instant-kill mode. This creates intense risk-reward gameplay where aggressive dodging early on determines your survival chances later. Watch for his tell-tale green flash before fatal attacks.

Super Mario Bad Time Duo Game Screenshot

When Mario and Luigi accidentally stumble into the Judgement Hall, they face off against you in this unexpected crossover! This unique Sans fight simulator replaces the skeleton brothers with Nintendo's famous plumbers, creating a fresh twist on the classic bad time formula with familiar controls and surprising new mechanics.

Nintendo Meets Undertale's Toughest Challenge

Super Mario Bad Time Duo transforms the traditional Sans battle into a Mario Bros showdown while keeping the core mechanics that make these fights legendary:

Plumber Power-Ups Meet SOUL Dodging

•Mario's Fire Flowers - Dodge flaming projectiles that replace traditional bone attacks
•Luigi's Green Thunder - Navigate electrical patterns with precise timing
•Power-Up Chaos - Face familiar Mario abilities reimagined as bullet-hell challenges
•Critical Health Warning - Luigi's attacks become instantly lethal at 1 HP
•Mushroom Kingdom Aesthetics - Classic Nintendo visuals in Undertale's framework

A Crossover That Actually Works

This isn't just a skin swap - it's a thoughtful reimagining that respects both franchises while creating something entirely new:

•Toad's Backstory: The accidental encounter that started this whole mess
•Dual Personality Combat: Mario's aggressive rushes vs Luigi's cautious but deadly precision
•Health Management Stakes: Strategic gameplay where every hit matters more near death
•Familiar Yet Fresh: Arrow key movement feels natural while attacks surprise veterans
•Crossover Dialogue: Nintendo characters speaking in Undertale's distinctive style

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Ready to Face the Mario Bros?

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Super Mario Bad Time Duo

Super Mario Bad Time Duo | Mario Bros Sans Fight Simulator Challenge

Game Overview

Nintendo Meets Undertale's Toughest Challenge

Ready to Face the Mario Bros?