Sonic Jam
"Sonic Jam" is a compilation which contains the four main "Sonic the Hedgehog" games released on the Sega Genesis: "Sonic the Hedgehog", "Sonic the Hedgehog 2", "Sonic the Hedgehog 3", and "Sonic & Knuckles". Unlike future "Sonic" collections, "Sonic Jam" does not use a Genesis emulator; the games are proper ports, and all are nearly identical to the original Sega Genesis releases, with the exception of minor bug fixes. "Sonic Jam" emulates "Sonic & Knuckles" "lock-on technology"—a special feature that allows the player to merge elements of "Sonic & Knuckles" into previous games, resulting in changes to the level design as well as the choice to play as Knuckles the Echidna in "Sonic the Hedgehog 2" and Tails in "Sonic & Knuckles".
Coleco Sonic
The Coleco Sonic is a handheld game console released in 2006 by Coleco Holdings, also marketed as PlayPal in Canada and the United Kingdom and Pocket Gear in Europe. It features 20 built-in games from the Master System and Game Gear. All the games can be played either on the integrated 2.4" TFT LCD display, or output to a TV via composite video. Its name references the Sega mascot, Sonic the Hedgehog, who stars in some of the games. The system comes with a power adapter, but can also use 3 AAA batteries as a substitute.