This article pertains to the beta elements of Sonic the Hedgehog Pocket Adventure.
Unused Intro Sequence
A sequence that would've played before the title screen/as the attraction mode, but was curiously cut out.
Change byte 0x1F of the rom to 0xFF in a hex editor to enable Developer Mode. (This is done automatically in old emulators such as R.A.P.E. and NeoPocott, for some reason.) When the Sega screen is displayed, press the Option button to jump to the main debug menu.
An interesting function of the debug mode is that it allows the player to switch between Sonic and Tails by pressing the B button. It is also possible to trigger a free-movement mode by pressing A+B simultaneously.