But from my experience, you can get 2 emeralds from GFZ1, 2 emeralds from GFZ2, 1 emerald from THZ1, 1 emerald from THZ2, and your last emerald on DSZ1.
I think this is the fastest way to get them.
[...] You can swim down with tails, [...]
This one is a pain in the ass! You can swim down with tails, but everyone else needs to use an elemental shield.
Also, there are (at least) 3 emerald tokens in GreenFlower Zone Act 2; One of them is very, very far away from the main path, but I have cleared that act with 3 tokens collected earlier today.
Warning: This post contains spoilers about something new in SRB2 v2.2 that wasn't in v2.1.Oh boy here i go playing GFZ2 for like two hours
Actually, you can get it by simply using the red spring and going straight for the token.This one is a pain in the ass! You can swim down with tails, but everyone else needs to use an elemental shield.