Zephyr has an unused fumble animation that was intended to play right after the player stopped controlling the tornado.

Zephyr, the main character, has an unused animation that consists of him wiping both of his shoulders.

One early concept for the game revolved around the player constantly growing the tornado. If the player stopped controlling the tornado, it would simply shrink and dissipate.

The face of Derek McCaughan, a developer at Loose Cannon Studios makes an appearance on the tiny Tokyo citizens in the level Showdown With Omegaton.

In 2019, a tutorial video was recovered from a deleted hard drive. The tutorial video included a powerup known as the Fujita Frenzy that allows the tornado to instantly grow in size and destroy larger buildings.

Within the Wii's movie directory, there exists an unused two minute E3 2009 attract trailer that showcases an early build of the game.

The maximum size for the tornado is 33.

A side mission mode was planned but cancelled in the later stages of development.

In earlier builds of the game, the player was scored by both the amount of Fire Flyers collected and the amount of property damage caused.

The concept art for the level Carnival Chaos features walk-around mascots of a raccoon, a hippo, and a turtle. This is a reference to the three main characters from Sly Cooper.

In 2009, Loose Cannon Studios released a ten page comic that takes place before the events of the game. The comic reveals that Zephyr, Nimbus, and the army of Wind Warriors originate from Harmonium, a planet located within the Nadam Galaxy.

The Wii version features two unused bonus cutscenes for the level Chicken Con Carnage. The first cutscene revolves around a news reporter by the name of Chuck Gavel reporting the strange animal behavior caused by the Fire Flyers possessing them. The second cutscene introduces a removed character named Wind Boy.

Despite having an idle animation in-game, Nimbus' talking animation is used for both an idle animation and a talking animation. His actual idle animation is partially unused since its only used properly in the final level, Showdown With Omegaton.

Judging by the Tokyo Metropolitan Government Building featured in Showdown With Omegaton, it's assumed that the level's location takes place in the center of Shinjuku City.

An E3 2009 developer walkthrough revealed that the game had a removed mechanic called advance chain collecting, which completely removes the smoke, sparks, and sizzling sounds emitted from objects containing Fire Flyers. As a result, this changes the game's difficulty. It is possible to enable this mode in the Wii version of the game via modding.

The player can unlock concept art for a completely removed level known as Drive-In, an early version of the map Roadside Destruction. While the map was entirely scrapped, music for the level was reused in Roadside Destruction and the Training Campground segment in Chicken Con Carnage.

By modding the game, it is possible to completely disable the blue screen of death glitch. The outcome varies depending on the level, and in most cases the game either crashes or becomes softlocked, but some unusual results can still come out of disabling it. In the final zone of Chicken Con Carnage, restarting the level with the dialogue popup on screen will result in Nimbus sliding away from the camera while idling.

By swapping map files, it is possible to play the first two single-player exclusive levels in co-op mode. The first level, Roadside Destruction, plays like a regular co-op level while the second level, Chicken Con Carnage, requires player one to take control of the tornado while the second player grabs the Fire Flyers. This mechanic was eventually reused during the Vortex Race and Totem Battle segments after completing all zones.

In 2009, audio engineer and programmer Scott Bilas released the Wwise project file for the game. While the project itself doesn't include the original .wav files, it's possible to reimport them within Wwise.

All three ports of Tornado Outbreak naturally support the game running at high framerates up to 60 frames per second. On actual hardware, the framerate is artificially capped to 30 frames per second. The primary reason behind this imposed restriction was likely due to performance issues.