Sneak attack  -  Always approach your opponents from an angle, especially Abobos, Chintais, or Willy. When this is done, your character can get right on top of them, where he can not be hit.

Mission 4 spike room  -  Your character will be sucked towards doors with spikes inside them, which will kill him. While pulling away from these doors, it can be hard to attack your opponents. A good tactic is to simply punch them when possible. After three or four hits (that do not have to be in sequence or close together), use an elbow punch to kill them.

Defeating enemies quickly  -  This trick is especially effective against Lindas, Lopars, and Williams. First, punch your enemy. Then, immediately after punching him or her, keep kicking your opponent until you are able to use the spin kick. When used against a Lopar, Linda, or Williams, one knockdown is all that is needed for them to be defeated. Note: This can also be used to defeat Chintai, although it takes a more time and is a harder to accomplish since he sometimes has a habit of ducking the spin kick. Three knockdowns are needed when fighting him as the Mission 2 Boss, and two knockdowns when fighting him thereafter.

Gameshark Codes

Infinite Energy
012F98C4

Infinite Lives
010499C4