FNF Occasional Rivalry: Sonic vs Mario

Rating:4.9 (196 votes)
Released:December 21, 2025
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

Epic Rap Battle:SonicvsMarioinFNF

Get ready for an explosive crossover inFNF Occasional Rivalry: Sonic vs Mario (Mugen Edition), where two of gaming’s most iconic characters go head-to-head in a rhythm-fueled rap battle. This mod brings together the speed of Sonic and the charm of Mario in a fresh and exciting take onFriday Night Funkin’.

Whether you're a long-time fan of the blue blur or the mustachioed plumber, this mod offers a fun and nostalgic twist that’s perfect for players on lower-end devices or non-Windows systems. Theweb-optimized versionensures smooth performance across platforms like Chromebooks, Macs, and Linux — no EXE file required!

What Makes This Mod Special?

In this Mugen edition, you’ll experience a high-energy musical showdown between two legendary characters who rarely share the same stage. The mod keeps the essence of the original while adding unique animations, custom compositions, and a vibrant visual style that sets it apart from other FNF mods.

The mod captures the spirit of friendly competition, making it a must-play for fans of both franchises andFunkin'veterans alike.

Key Features

  • 🎵Custom Music: Original track composed byCow, setting the tone for the ultimate crossover.
  • 🕹️Web Optimized: Play directly in your browser, no downloads or installations needed.
  • 💻Cross-Platform Support: Works on Windows, Mac, Linux, and even Chromebooks.
  • 🧊Nostalgic Vibes: Brings together two of the biggest names in video game history.

Meet the Creators

This mod was brought to life by a talented team of developers and artists. Here's a look at the key contributors:

Mod Team

  • Cow– Composer
  • gogothomasandcars– Animator and Creator
  • BellowBomb– Original Creator

Engine Team

  • Shadow Mario– Main Programmer
  • Yoshubs– Assistant Programmer
  • RiverOaken– Main Artist/Animator
  • bbpanzu– Ex-Programmer
  • And many more from the open-source community on GitHub

Original FNF Credits

  • ninja_muffin99– Programming
  • PhantomArcade3kandevilsk8r– Artists
  • kawaisprite– Music
  • With contributions from the FNF GitHub community

How to Play

The web version ofFNF Occasional Rivalryis designed to be lightweight and easy to access. It's ideal for those with limited storage or older hardware. However, some features or mechanics from the full PC version may differ slightly, so for the complete experience, consider downloading the original mod on PC if possible.

Dive into the battle now and see who comes out on top — Sonic or Mario!