Introduction[]
After seeing this conversation I realized that there is still a lack of speed feats for many characters in the franchise, so to try to help I decided to calculate a feat that can scale to many characters. Actually this feat has already been calculated, however in the original version, which can be seen here, does not consider some points given in the scene and then I will apply this here.
Original distance[]
I will consider the size of Shutumon to be the average size of an adult woman: 1.6 meters.
Distance (Garummon-Duskmon) = (1.6/50.60) x 189.84 = 6 meters
Agnimon Jump[]
Angle between screen and Agnimon : 2atan(tan(70/2)*(305.55/764)) = 21.4600632 degrees
Distance between screen and Agnimon (Considering that Agnimon has the common size of an adult, 1.8 meters.) : 4.7495 meters.
Angle between screen and Shutumon : 2atan(tan(70/2)*(55.569/764)) = 3.94755833 degrees
Distance between screen and Shutumon : 23.214 meters.
Distance of the jump: 18.4645 meters.
Time-Frame[]
That was the biggest question about the feat, it should be noted that it took a long time for Agnimon to jump. Garurmmon uses his technique when two other characters are still to use his techniques and soon after everyone uses the Agnimon still speaks a phrase and only then does he jump. Just after the jump he appears at the peak of his jump while watching the result (which was bad for them).
In any case obeying the exact sequence of events and considering the lowest coherent value, at the very moment Garurmmon launched his Solar Laser just as Agnimon jumped and the two reached their goals simultaneously (Note that he is much more capable of That Agnimon took a long time to jump, in case he jumps up too early he could open the way for Duskmon to escape, so it is much more likely that Agnimon jumped only when Garurmmon's coup was already much closer to Duskmon), then we arrived To this:
Solar Laser Speed: 299792458 m/s (Same speed used in the already approved calculation, the Solar Laser is literally light absorbed by Garummon that it releases into its attacks, moreover official profiles confirm its attack at the speed of light.)
Distance: 6 meters.
Time = 6 / 299792458 = 2.00138457e-8
Agnimon Speed = 18.4645 / 2.00138457e-8 = 922586306.79, 3.077c or FTL.
Take note that these values are consistent with some descriptions of Hypercolosseum which confirms that both Garummon and Wolfmon are able to move at the speed of light.
And understand that these are obviously not the maximum velocities of both, the Digimon are commonly absorbing more and more data and this allows them big increases of power (In the Frontier itself there is an IceDevimon that absorbed so much data that the characters were afraid that it was More powerful than Cherubimon himself) then it makes sense that after Agnimon has absorbed various data until this scene occurs he has managed to achieve that speed.