Sonic the Hedgehog Pocket Adventure (Oct 22, 1999 prototype)

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Title Screen
Sonic the Hedgehog Pocket Adventure (Oct 22, 1999 prototype)
Build date Oct 22, 1999
Dump status Released
Dumped by drx
Released by drx
Origin Prototype cartridge
Labels SNK (P) ソニック ロックマン Ver. 10/22 セガ承認用 (?) 99.10.22 10D7
Dump method Tengu Neo Geo Pocket Dumper
Ownership Japanese auction user (2016), drx (2016-Present)
Game Sonic the Hedgehog Pocket Adventure
System Neo Geo Pocket Color
Genre Action
Release date JP Jan 11, 2000
US Nov 30, 1999
EU Dec 3, 1999
Download Sonic the Hedgehog Pocket Adventure (Oct 22, 1999 prototype) (info)

A prototype of Sonic the Hedgehog Pocket Adventure for the SNK Neo Geo Pocket Color.

Notes

  • Pressing start at the Sega screen brings up a debug menu.
  • Contains two test maps for the action stages, and two test levels for the special stages.
  • The debug menu contains different level names for various zones, but the zones themselves have the final names in their title cards.
  • Some aspects of levels have collision problems (i.e the springs in Casino, and the rotating platforms in King Relics).
  • The boss in Death Egg Act 2 doesn't spawn a capsule upon defeat.
  • Some sound effects are missing from the prototype.

Screenshots

Videos

Header

00000000 43 4f 50 59 52 49 47 48 54 20 42 59 20 53 4e 4b COPYRIGHT BY SNK 00000010 20 43 4f 52 50 4f 52 41 54 49 4f 4e 40 00 20 00 CORPORATION@. . 00000020 39 00 0f 10 53 4f 4e 49 43 20 50 4f 43 4b 45 54 9...SONIC POCKET 00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Origin

  • The label on the cartridge reads:
SNK
(P)
ソニック(Sonic)
ロックマン (Rockman)
Ver. 10/22
セガ承認用 (for Sega's approval)
99.10.22
10D7 (checksum)
  • The label seems to indicate the the label was used on a cart that might have contained a Rockman (ロックマン) game at one point.
  • The ROM was obtained using the Tengu Neo Geo Pocket Dumper. Because there were quite a lot of errors in the process, the cartridge was dumped 16 times. 9 of the dumps were identical to the released ROM, 7 others had errors. The errors were in different places of the ROM, so it was possible to rule them out.

Acknowledgments

  • Thanks to Jelq God, Jen, JTE, Peter Küffner and SoNick for helping with the release.

See also