Change OT to Andy\FFFF\0000\0000\0000 becuase since it's an egg poke, it doesn't need a terminator and change the name from Tyranitar\FFFF\0000 to Tyranitar\FFFF. Regenerate the PID with pokegen or something to fix the invalid PID.
It also wouldn't hurt if you give it pokerus type 15.0 or something.