Calc GaoGaiGar - Goldymarg vs ZX-05

Goldymarg flies up to GaoGaiGar in space to destroy ZX-05 all the way to the ground. Previously I calculated the height of ZX-05 to be 5666.9km tall.
Timeframe is 20 seconds.

T = 5666.9km/20s
= 283345/340.29
= Mach 832.657439

Goldymarg is a heavy boy, weighing 625 tons (or 625000kg).
So on top of the speed, we can also find the kinetic energy.

KE = (0.5)mv^2
= (0.5) X 625000 X 283345^2
= 2.50888716e16 joules
= 5.9963842256214148208 megatons

Final Results
Goldymarg flies into space (speed) = Mach 832.657
Goldymarg flies into space (energy) = 5.996 megatons