"The ultimate form of Synchro...?"
Kira smiled faintly, growing somewhat expectant as well.
It was finally coming.
The legendary Top Clear Mind, the ultimate Synchro, Delta Accel Synchro. In the history before Z-ONE altered it, it had originally been a new path pioneered by Fudo Yusei. After the Timeline changed, Antinomy taught it to Yusei, leading him to comprehend "Limit Over Accel Synchro" during the final battle.
Kira had actually always been curious whether Accel Synchro really required riding a bike.
Most of the key duels in the 5DS anime had taken the form of Riding Duels. No one had ever used the Accel Synchro technique in a traditional Standing Duel without riding.
Moreover, in the anime's depiction, Accel Synchro always involved the D-Wheel, rider, and machine becoming one. They rode beyond the speed of light, flashed forward with acceleration, and had already completed the Synchro Summon by the time they reappeared. Going by that depiction, it theoretically might indeed only be possible to perform Accel Synchro while riding a D-Wheel.
But if that were the case, duelists from the Synchro Dimension would be at far too much of a disadvantage when facing duelists from other dimensions in traditional Standing Duels. If they could not ride, they could not summon their aces. Wouldn't they be doomed if they encountered a Dimension Invasion from a dimension that did not ride?
So Kira had wondered long ago whether it might be possible to perform Accel Synchro by accelerating on foot.
Theoretically, a D-Wheel was merely an acceleration tool. The key to performing a Synchro Summon was the Stardust Particles released by the Perpetual Motion Machine inside it. So if a miniature Perpetual Motion Machine were installed in a Duel Disk, could a duelist complete Accel Synchro at faster-than-light speed without relying on