He is in the Pacific Northwest, where he lives in a cave. Once you have confirmed the other 3 cryptids, you can go there and follow him in the helicopter.
A gorilla
You get the Island Medallion after you prove the existence of three of the four cryptids, and rescue Bigfoot from the evil Gretchen Grimlock. (see related question)
Yes, you can find proof of The Jersey Devil, Bigfoot, Nessie, and the Chupacabra. (see related question)
just wait for it to move the follow with helicopter
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
just keep following from a distance
After you have confirmed the other three cryptids (Nessie, Chupacabra, and the Jersey Devil), and brought back the inconclusive footprint from the Himalayas, Mews will send you in pursuit of Bigfoot, which is similar to the Yeti.
Reboot Poptropica if either the Helicopter or Bigfoot stops moving. This is a known glitch affecting less than 1% of Poptropica players on the island.
After you only get a footprint photo from the Himalayas, Mews decides that it is too difficult to track the Yeti. When you prove the other 3 cryptids, he sends you in search of Bigfoot, and you have to rescue the creature from the evil Gretchen Grimlock.
In the Pacific Northwest, follow Bigfoot in the copter as he moves through the trees. Be careful because he may trick you. You have to follow him until he reaches the caves.
well its easy if you dont get the pic you dont defeat the island
She is an unscrupulous fortune hunter out to profit from the cryptids she finds. She sabotages your kite surfer, then appears at the end to try to kidnap Bigfoot. (see related question)