Turbo Ether - Near the bottom of the last section.
Speed Source - On the small outcropping near the end of the last section.
X-Potion - Near the top of the last section.
Vaccine - Near the middle of the second section.
Turbo Ether - Near the central pillar-like structure in the second section.
X-Potion - Near the bottom of the first section.
Remedy - Near the middle of the first section.
Elixir - Off to the right in the first section.

Magic Counter - Near the bottom of the second section.
Mega All - Press [OK] repeatedly while jumping across where the Mega All is floating in the last section.

Bottom of the Northern Cave
Split Point 2
Northern Cave
World Map