>>56495146E=(1/2)mv2
v=mach 2=2*343=686m/s
m=39.5kg
E=9294271J
Each TNT has an energy of 4184J
So Pidgeot's Quick Attack is the equivalent of 2.221kg of TNT
X-Antibody Digimon keeps their original attacks. One of them is described in the Reference Book as Starlight Explosion which is reinforced by its X antibody. The effect are "Rains golden grains from its wings that purify evil, or explodes with light". Hououmon also have Life Force, which "Generates a wonderful energy that absorbs the enemy's life force.".
It also have Mach Wing. Now, to reference Mach in the name, you have to assume that it's at least Mach 1. From the same weight, it's multiply by 4 from Mach 1 to Mach 2. Pidgeot is 1.5m. According to the picture, Hououmon is more than 4 times the size of Pidgeot.
Hououmon X would be fine.
