Deep Sea

Deep Sea (しんかい Shinkai) is a location in the bottom of the sea where, in Mega Man Zero 4, a giant drill submarine filled with explosives was being used to drill into the earth and explode, breaking a tectonic plate to start a strong earthquake. Zero is sent to the area to stop the drill, and defeats Tech Kraken. Because of the depth the Drill Submarine was at, Zero will end up steadily taking damage from the oceanic pressure, eventually being destroyed after a certain amount of time has passed.

Layout
The weather of the stage can be set to snowy or sunny.

Part 1 - Maze
The first part of this stage is set in a maze-like area, where the screen wraps around. The player has 140 seconds (roughly 2 minutes and 33 seconds) to escape the maze. If they fail to, they instantly lose a life, and have to start the maze from the beginning.

When revisiting the stage, this section is omitted entirely.

Part 2 - Sub
The player fights Spy-Larue I at the beginning of this section. After that is a horizontal climbing section filled with various enemies.