I get Tonberry GF after I defeated Odin so I have no time limit. And I got it on the 2oth tonberry I killed.

My strategies for killing tonberries is having Quistis do micro missile 2 times and Irvine do Canister Shot for 2 times.

My strategies for Killing Tonberry King is having Irvine do Canister Shot and Quistis do Gatling Gun and Squall do the healing whenever Irvine or Quistis's health fall too low to prevent them from dying after the "junk" attack (That time becuase my Squall has no strenght junction so his attack hit is low.)