I made a video with both the BFFs and the
both together so you can get them both all in one go.
I did write a message in the video at 2 parts where you must keep the conversations going. Skelleseer is your 1st one, keep pressing triangle until you can't any more,
When you get to the merry-go-round make sure to go on it then when you get off and open the terrible jokes you share with Joel in the main game you will need to do the same again, just keep pressing triangle for every awful joke until no more can be said. Your last conversation is in that booth just after the jokes but i didn't want to spoil the entire thing so only showed you where to go.
As for showing you where to go, in the video i start a bit before where each item is located instead of these videos that start and you are staring at the collectible not giving you any bearing or direction what so ever so i hope the way i done it makes it easier on you all.
The videos on youtube done exactly the opposite by opening with the item in front of me done a screen swipe to the next item and again there was absolutely no direction given which imo is useless.
I hope this helps though, i would keep an eye on the conversation counter in the costume shop as there are a few there and the reason it jumps a few when using the Skelleseer is due to the reason i stated at the start each question counts.
If you have any questions, please ask and i will try my best to help.