I killed every Rustyroot I could find, all over the island, for a week. Finally got one of these to pop to the left of the pond at the base of the waterfall where you kill the Rolly Gulper (about 5 yards from where I found a yellow junkhopper). It was the bottom lefthand corner of the pond, by the nearest tree, NW part of the island. He was uncommon, but I haven't even seen one spawn since, and that was 4 days ago.
1843 pets
I killed every Rustyroot I could find, all over the island, for a week. Finally got one of these to pop to the left of the pond at the base of the waterfall where you kill the Rolly Gulper (about 5 yards from where I found a yellow junkhopper). It was the bottom lefthand corner of the pond, by the nearest tree, NW part of the island. He was uncommon, but I haven't even seen one spawn since, and that was 4 days ago.