Sinking Feeling
From Monster Hunter Wiki
This quest has a little bit of a twist to it, so be careful. All of the quests you have done before this have been during the day- but this one is held at night, so the locations of the animals are different.
As always, grab your items from the blue box and head out.
Three Popo are located in zone six, three in zone eight, and two in zone seven, all of which will reappear after exiting and reentering a zone after killing the popo.
Much like the mountain herbs, popo tongues are considered treasures, and every tongue you collect over the three that you need will give you 45z and 45 pokke points extra. Popo allow you to carve them twice after killing them, so sometimes you may even get two tongues (yeah, I know, it's weird) from one popo! When you have three or more popo tongues, head back to your camp and turn them in to the red box to collect your reward.
Side note: Popo do not generally attack you, but some might. It usually consists of a head butt that knocks you down, but it isn't too major. Also, when you attack one Popo (or any other monster in a zone that Popo are in) the rest of the Popo that see you attacking might run away! So be careful when attacking Popo, and make sure the others can't see you when you attack. If they do run away, don't worry too much about it- just exit the zone and come back, and the popo will be there.
Warning: Be careful, because while you are killing the popo, there is a chance that a Tigrex will appear. If this is the case, and this is the first time you have ever done this quest (meaning you have crappy armor and a crappy weapon) then run. Unless you have a lot of skill, you'll probably end up dying trying to fight this monster, so just leave the zone and wait till he's gone, or work on a different zone.
~Ashen
The Tigrex will follow you to the next area you go too, so I would go to area 7, kill some popo, and wait for him to come. When you see the eye or the dark circle on the ground, run to 8. He should stay there and then circle through 6,8 till you got the tounges.
WARNING: Best to switch where you go to the second time. Instead of going 7 to 8, go 8 to 7 so you can get back quicker. Or you might have to run right past Tigey.
Dont forget the Tigrex If you stay in one area to long he will fly to your area then come running after you and then your dead
