Chemical Plant Zone

Chemical Plant Zone is the second zone in Sonic 2.

Instruction Manual Description

Flash through a high-tech maze bult with pipes and ducts. Robotnik's flooded the factory with a pool of toxic liquid called "Mega Mack" that poisons Sonic in a few moments!

Villains

Enemies

• Grabber - Spider enemy, hangs from the ceiling and grabs Sonic. Then unless Tails can destroy the Grabber, it explodes and hurts/kills Sonic.
• Spiny - Anemone enemy, moves very slowly and spits out missiles.

Boss

• Boss: Dr. Robotnik's Chemical Machine
• Hits: 8

The tricky part about this boss is that the floor panels on each side of you flip over, kind of like trap doors. That being said, be careful as to not be on any one of those platforms while they turn over, or else you'll plummet to your death. The trick here is to simply bounce on Robotnik TWICE in a row while he's docked on the side of the screen, filling up his giant vat thing with blue chemicals. When that's full, he'll try to dump it on you. Not to worry, just jump over the chemicals, it's not hard at all to do so.

Note: In the beta, sprites have been found of Robotnik accidentally dumping the chemicals in his machine on himself. This may be a missing boss ending sequence similar to the one in Emerald Hill Zone.

Differences between beta and final

• The loop-de-loop platforms have octogonal edges instead of being flat.
• The platforms which move across rails (most noticably in Act 2) are much smaller.

Technical Information

0D Chemical Plant Zone

2E02 CPZ Palette

2E62 CPZ Underwater Palette

D27C CPZ layer deformation info

401B2 CPZ animated pattern load cue (0)

40762 CPZ misc sprite mappings

42376 CPZ object debug list

453C0 CPZ and DEZ primary 16x16 collision index

454E0 CPZ and DEZ secondary 16x16 collision index

48774 CPZ act 1 level layout

48A84 CPZ act 2 level layout

4FAFE Animated background section in CPZ and DEZ

B5234 CPZ/DEZ 16x16 block mappings

B6174 CPZ/DEZ main level patterns

B90F4 CPZ/DEZ 128x128 block mappings

E5E2C CPZ act 1 ring locations

E5F9E CPZ act 2 ring locations

Resources

s2-cpz.zip S.L.E.E.P. tileset for CPZ and DEZ by Bapinney.

s2b-cpz.zip S.L.E.E.P. tileset for CPZ in Sonic 2 Beta by Esrael

Chemical Juice Funky remix by Jivemaster. Courtesy of Overclocked ReMix.

Chemical Plant Zone.cca A nice Chemical Plant Zone collection with Background, Foregrounds, and Platforms collected by Gold Sonic. In Multimedia Fusion / Click n Create format.