Unused content

Speedy Blupi and Speedy Blupi 2 contain various contents which are never utilized or intentionally exposed to the player.

Speedy Blupi
Blocks  and   are a variant of the Level start block (in an "uncleared" and "cleared" state, respectively) that leads to an unimplemented 8th world. Its graphic is that of a golden Level start block, but with no world icon. It is fully functional and will transport Blupi to world 80 if used in Start. The block was repurposed for Pipes World in Speedy Blupi 2.

Speedy Blupi 2
Blocks,  ,  , and   behave the same as other Level start blocks, but for unimplemented 13th and 14th worlds.

Unused health variable
During gameplay, an integer variable is set to a value of 100 and never used. It can be saved and loaded with quicksaves, and will maintain its value if modified externally. Judging by its location in memory immediately next to the power-up energy and air meters, this was likely intended to be a health meter (further supported by the unused mention of "Tomatoes" in the string table, which restored energy in Planet Blupi).

Unused text
The games' STRINGTABLE resources contain several leftover strings from Planet Blupi.

Unseen level titles
Multiple levels in Speedy Blupi 2 have titles, which are only visible when using the xmission cheat to browse in-game levels.

Unimplemented user manual
The Phase event with ID 1553 is conspicuously skipped over in the game's array of Phase definitions. In the source code of Planet Blupi, this ID is defined as  (now   since version 1.9), yet never referenced. This was likely intended as a user manual describing the features of the game, but was scrapped in favor of a physical instruction book. As Planet Blupi served as the base engine for Speedy Blupi and Speedy Blupi 2, this phase event is likely the same.