Street Fighter Zero 4, also known as Street Fighter Heavenly Kings 4 (Chinese: 街霸天王, Pinyin: Jiēbà Tiānwáng) is a bootleg port of Street Fighter Zero 3 released in 2000 for the Game Boy Color.
Overview[]

Gameplay.
As a port, Street Fighter Zero 4 cuts out the majority of mechanics from Street Fighter Zero 3 such as the Super Combo gauges, the -ism styles and the Guard Power gauge, making it much more similar to Street Fighter II in its gameplay. A is used for punches while B is used for kicks. You can also throw the opponent while holding forwards or backwards and pressing A. Each character has about either two or three special moves, most of them being the same commands. Basic attacks appear to do chip damage to the opponent which is unusual for a Street Fighter game. There also seems to be a brief invincibility period after you finish getting up from a knockdown where you can't be hit. If you get hit in the air, you never recover mid-air and instead, lie down once you land.
Only thirteen characters out of the original twenty-eight are in this port and four of them are clones, making the roster only consist of nine unique characters. The returnees from Street Fighter II (with the exception of Ken) retain their move sets (Vega (M.Bison) gets a Hadouken instead of his Psycho Crusher) and their sprites seem to be based on the Game Boy port of Street Fighter II. The remaining cast use completely different movesets however and much of their sprites and animations don't match, some having the wrong icons and some others seem to be completely mixed up; Cody is a clone of Guy, Gouki's (Akuma) sprites are based on Cody's and Ken's sprites are edits of Ryu's but with Gouki's hair. Some of the characters seem to be derived from King of Fighters characters: Gouki has animations based on Terry Bogard and Guy has some animations based on Geese Howard. The palettes for most of the fighters don't match, resulting in characters such as Gouki being a red and yellow Cody and Vega being entirely blue. On the select screen, there are what appear to be question mark icons but you can't access these and there's no way to unlock them.
Once you choose your character, you fight through the rest of the roster out of the best two out of three rounds. There is no ending to the game; once you beat it, you get your usual victory screen and the game resets.
The stages are all from Street Fighter Zero 3 but resized down. None of the music is from Street Fighter Zero 3 however, mainly consisting of tracks from Sachen or Sachen-related games. The title screen track is from the Game Boy Color version of Jurassic Boy 2. For every fight, the game goes back and forth between two tracks: one from the first level of The Dragon and another is the boss theme from Contra Spirits, being based on the arrangement from Ei-How Yang's NES port of Contra Spirits.
Characters[]

Character select screen
Ryu / Ken - Ken is merely a headswap of Ryu but appears to use Gouki's hair.
- Down, Down-Forward, Forward, A: Hadouken
- Down, Down-Forward, Forward, Down, Down-Forward, Forward, A: Shoryuken
- Down, Down-Backward, Backward, B: Hurricane Kick
Chun-Li
- Down, Down-Forward, Forward, A: Kikouken
- Down, Down-Backward, Backward, B: Spinning Bird Kick
- B repeatedly: Lightning Legs
Vega (M.Bison)
- Down, Down-Forward, Forward, A: Hadouken (Psycho Shot?)
- Down, Down-Forward, Forward, Down, Down-Forward, Forward, A: Slide Kick (This slides further than his Crouching Kick.)
- Down, Down-Backward, Backward, B: Scissors Kick
Blanka
- Down, Down-Forward, Forward, A: Blanka Ball
- B repeatedly: Electricity
Sodom/Nash
- Down, Down-Forward, Forward, A: Rapid Slash
- Down, Down-Forward, Forward, Down, Down-Forward, Forward, A: Jumping Slash
- Down, Down-Backward, Backward, B: Lariat?
Cody / Guy - This character's design appears to be based on Guy. Cody uses Gen's portrait in the HUD. Guy uses Gen's icon on the select screen and Cody's icon in the HUD. The character seems to be based on Geese Howard from the Fatal Fury/King of Fighters series; using his stance, win pose and his Hishou Nichirin Zan.
- Down, Down-Forward, Forward, A: Hadouken
- Down, Down-Backward, Backward, B: Hishou Nichirin Zan
Gouki (Akuma) - Gouki appears to be Cody while fighting. Gouki seems to be partially based on Terry Bogard from the Fatal Fury/King of Fighters series; having his stance, Power Wave and his win pose.
- Down, Down-Forward, Forward, A: Power Wave
- Down, Down-Forward, Forward, Down, Down-Forward, Forward, A: Air Fireball
Gen - Gen uses Guy's icon on the select screen and R. Mika's icon in the HUD.
- Down, Down-Forward, Forward, A: Hadouken
- Down, Down-Backward, Backward, B: Leap Kick
R. Mika / Cammy - R. Mika uses Guy's icon in the HUD.
- Down, Down-Forward, Forward, A: Hadouken
- Down, Down-Forward, Forward, Down, Down-Forward, Forward, A: Air Hadouken
Trivia[]
- The PCB is similar to Ka Sheng's other Game Boy Color releases and it was even released on a rumble cart.
- This wouldn't be the only Game Boy Color game Ka Sheng released from EX-Sachen developers, as they were responsible for releasing the majority of Makon Soft's library. However, the developer was most likely not Makon Soft but a team related to Ei-How Yang, given its ties with Contra Spirits and Jurassic Boy 2.
- The title appears to be a mashup of Street Fighter's simplified mainland title (街霸, Pinyin: Jiēbà) and King of Fighter's old Chinese title (格斗天王, Pinyin: Gédòu Tiānwáng).