Basic Mechanics
Jumps
Jump - Press ub, u, or uf to leap into the air. Double Jump - Press ub, u, or uf in the air to leap again. Only Hanzo and Fuuma can do this. Wall Jump - Press uf when against the side of the screen and airborne to leap off the wall. Only a handful of characters can do this. Triangle Jump - Press uf when against the wall VERY close to the ground. Only wall jump characters can do this. It can result in some very surprising air attack situations. Jump Cancel - Some normals (and a few specials!) can be canceled into a jump by simply pressing ub, u, or uf. This is a very important part of some character's games.
Dash
Press f,f to make your character run or quickly step forward. Dashes can be canceled by almost anything, and some attacks actually transform into other attacks when performed during a dash.
Back Dash
Press b,b to dash away from your opponent. These have a LOT of frames of invincibility on them, and can be used to escape most of the games seemingly 'inescapable' situations. You can even Backdash on wakeup to avoid your opponent's wakeup game. They can anticipate this, however, and take countermeasures against it. It is a lot less effective when cornered, as well.
Air Block
Hold b in the air. Not all attacks, specials, or supers can be air guarded, but many can. In WHP, you can attack on the way down AFTER airblocking!
Air String
Many or all characters can do multiple weak and/or medium attacks in the same jump!
EX Special
If your HERO bar is full, certain special moves will transform into EX Special moves the next time you perform them. This usually results in more hits and/or increased damage, and sometimes some invulnerability on startup.
Super
If your health bar is flashing red (meaning you are below 50% health), you can access your character's super move(s). These may be done as much as you like without any farther cost, just like a special move.
Hero Super
If you have red health AND full HERO bar, the next time you perform a Super move, it will automatically transform into a HERO Super. This usually results in more hits and/or increased damage, and sometimes invulnerability on startup.
Advanced Mechanics
Juggles
Some normals and specials can be used to hit an airborn opponent that is already in hitstun. These usually require correct spacing and timing.
Guard Crush
This is a property of certain normal attacks. If one of these is blocked, your opponent's guard will be ripped open and they will be vulnerable to a follow up attack. Once you are guard crushed yourself, you have two options to escape. Both must be done very quickly. You can either backdash (b,b), or you can wiggle the joystick a few times to shake out.
Shot Break
This is a property of certain normal attacks. These normals have the ability to destroy a projectile, causing no damage to either player. Shot Break normals have no extra effect when used on your opponent, however.
Throws
Press f+HP or b+HP when very close to your opponent. Throws cannot be blocked or reduced in any way. Some characters can throw with HK as well. If your character's throw is a grab or hold, you can increase the damage/duration by wiggling the joystick. No button presses are necessary. Doing so also usually yields 70% or more HERO bar buildup. Throws have 0 frame startup in WHP, and are very useful during wakeup.
Option selecting throws is a very important part of World Heroes Perfect.
Air Throw
Press f+HP when close to an airborne opponent, while you are also airborne. Only a few characters can do this. In order to tech, hold b after being tripped or otherwise knocked over to land on your feet instead. If your opponent expects this, they can usually score more free damage on you. Not all knockdowns can be teched.
Clash
VERY occasionally, two attacks will collide and negate each other, making a unique sound effect and pushing both characters back. Neither takes damage.
