I'll tell you the answer to mine... Since it was forgotton:
The purple
1st line: Would you kill yourself for that 1 shard that you missed? I also remember someone saying that they'd be happy to get a purple pearl on 54, even though they can't get all of them.
2nd line: It's co.0, gotton by getting the purple

. Since 6 is the rarest, followed by 5 and so on, with no other imput, someone would say that co.0 is the most common of all.
3rd line: Finishing the

quest unlocks the sparkleing soda, which should be the last item you need for the MT diet quest. Which unlocks the super purple pearl.