The viewfinder game was part of the demo of Cryptids island and had almost nothing to do with the quest. It was possible to see a hazy outline of Nessie after you saw the dog barking. If you did, you received a Nessie costume prize.
The loch ness monster on poptropica in Cryptids island in the viewfinder. When you click the viewfinder, stay near the top of the water where the rocks are. You will find Nessie near a rather flat rock. And near the front, will be two rocks together behind a piece of land.
In the monastery.
There does not seem to be a horn on Cryptids Island. There is a flute (a pennywhistle) which you receive after the submarine ride, after you defeat the sore loser at darts again.
You find it caught on the fence of the farmer's brother.
Yes, you can find proof of The Jersey Devil, Bigfoot, Nessie, and the Chupacabra. (see related question)
There are some matches in the pub at Loch Ness.
Find all 4 cryptids
after you cut it it automatically goes into your inventory.
Dive to the bottom and then go left.
first you have to find all the other cryptids then you go in the helicoptor to the new location and follow him to his cave
The prize for spotting Nessie during the Cryptids Island preview (beginning December 2, 2010) was a Nessie Hat. (see related link)
You find him in the lab, where you first talked to him. From the helipad. it is just to the left.