Here is my 100% Achievement Guide!
This is definitely a long winded one.
Our job is to get the two guys sitting on TVs texting each other to go all happy and giddy and take a selfie.
But there is quite a bit we have to do first..
So there a few various mini puzzle games (Again, all randomized) you need to do.
But once they are complete, 4 signs appear (Could be anything from shark to poop, to any emojis)..
Once you complete one, we then need to get a video which you can get by heading to the very left of the screen, playing with the antenna, turning the TV station to feather, then interacting with it to get the guys snorkel equipment.
Go all the way back to the right where you started, and dive down, this is where the video is.
Grab it, and head back to the 2 guys on tvs texting.
Put it in the VCR and the one guy starts dancing and drops his phone.
Quickly grab it and remember the 4 emoji codes you seen at the beginning of the level after you beat the matching pairs game.. Go ahead and use those to text the other guy (Skull, Thumbs Down, Shark Emoji)
He is all like bruh screw you! and we get an item we need.
Do a few more things and use the same trick to get his phone and text the guy with Shark, right Arrow, Fish then Burger.
Grab his TV and then carry on doing what you need to do.
The third and final thing we need to text is Crab, Shark, Camera, Love and this is where the achievement finally unlocks.
If you want to see all of what needs to be done to get to this point, go to 30:00 in the video, and it ends around 41:00
Hope this helps!