This isn't the type of video this channel normally uploads, and it will almost certainly be the only one of this sort. In this video we address a bug in Mario Kart 8 Deluxe that greatly impacts time trials, as well as two additional bugs. This video should've been made sooner, but we were hopeful these bugs would be fixed by now. We recommend reading the description to recap the video and to get some extra insight. Japanese subtitles have been added by Y146 !

Mario Kart 8 Deluxe has an impressive time attack side to it. In the Time Trial game mode the premise is that every attempt begins under the same circumstances for all players. Same course, same start, same items, same vehicles. These conditions pave the ground for the fairest form of racing Mario Kart has to offer, as your final ranking is determined solely by your racing skills and technique mastery. It's over 7 years since this game was released, and in that time players have refined the way most tracks are driven. The time trial leaderboards are often tight-packed, and on the most basic courses, the world record time often only leaves only a few hundredths of a second to be gained. At this high of a level, falling a kart length behind the world record ghost means your chance at beating it is over.

In the Wave 5 update a few vehicle parts had their performance stats increased, but after downloading the update, players quickly spotted a glaring bug in the game which later was dubbed the "Accel Bug". The Accel Bug is a flaw with vehicle deceleration physics, that makes vehicles decelerate excessively if your boost ends while you're driving in a straight line. The bug makes you drop slightly below intended speed after the boost, requiring you to accelerate for 1 - 3 seconds to regain it, which loses varying amounts of time depending on how much acceleration your vehicle has. This bug has technically been in the game ever since it launched, and Accel Nudges have been used to set world records on a few select courses in the past, but it never caused any problem for all these years. The deceleration system was effectively doing its job, because all players would decelerate the same, and players who time trial simply had to perform equally good Accel Nudges as the ghost they were trying to beat. That was until Wave 5 was released, because the changes Nintendo made in this update significantly worsened the bug, making players decelerate to a substantially lower speed than ghosts driven on the previous version of the game. The Wave 5 update made it impossible to decelerate as little as the world record does on certain tracks, despite using the same vehicle, and doing perfect nudges. This is why we consider the Accel Bug to be introduced in the Wave 5 update.

We define the Accel Bug as an unpreventable speed disadvantage that occurs every time your vehicle stops boosting while driving in a straight line, which happens repeatedly throughout several courses. This has made it impossible to beat the fastest time in the world on two separate courses, which has lead to the community to redefining what the world record times are. The bug also makes it significantly harder to reach the top 10 on these two courses, and accel nudges barely help and are a nuisance to perform. People enjoy courses using low acceleration combos because of how straightforward the best lines are, and how steady joystick movements make you carry more speed through your drifts (neutral drifting). The perfect Accel Nudge input is different for every vehicle, and in a perfect instance a nudge can halve the time you lose from the Accel Bug. It's too precise for players to do perfectly consecutively, and it's hard to imagine something less fun than losing all the time you gained in a drift, the moment your following mini-turbo ends. The developers changed something under the hood in the Wave 5 update, and we can only speculate as to what adjustments were made. The Accel Bug is still in the game as of the time this video was published.

We want to add that the Accel Bug is notoriously difficult to fix, because it lies at the core of the game's physics. Fixing the problem at its root would involve changing how the game feels for millions of players, and the ramifications of such a change is something Nintendo expertly has considered, and decided not to go through with. Reducing the metal tires MT by 0.25 would give the vehicle the same stats as it had during Wave 4, and this should be all it takes to make the world record times attainable again.

Watch the video to learn how the bug plays out, and the impact it has on the time trial community.

Credits: Pii, Jimmy, Soup, Messi, Nico4132, Alice(ありす), MKWilliam, Army, Grace, Cole

MK8DX Records is not affiliated with Nintendo. This channel is non-profit, and is built on voluntary work.

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