Different styles of topspin

Hey Alios,

One of the opponents of mine has a different way and style of serve we cannot judge his spin,placement and speed he serves a new style every day and we have named him the butterfly he has a typical topspin different from what you taught his topspin starts from the ankle and finishes as his hand straight with the the hand joint a bit curled his topspin comes with sheer speed and flight the spin is doubled and his power is less please explain his topspin.

thanks