Sega Master System / Mark III / Game Gear
Hiyarika (Stage 3): Just below the Blackheart's warp.
Chaprun (Stage 5): Located in the middle of the "fountain" scene.
Sbadarian (Stage 7): In a hole in the "desert" scene. Highly crucial.
Sarcand (Stage 2): In the "crystal" scene that has the shop in it, shoot at the tallest crystal.
Sbadarian (Stage 7): In the scene where the Blackheart's warp is located, it's in the middle of the three loops at the bottom.
Bow Bow (Stage 4): In the "inferno" scene with the shop in it, shoot around and you'll find the bottle.
Fuwarek (Stage 6): In the opening scene, left of the shop. A little strategy is to buy the red bottle at the hidden shop and then get the freebie.