Glide
Gliding is a technique available to Meta Knight, Charizard and Pit. It allows the character to glide in the direction they are facing, and angle up or down, similar to the Cape item in Super Mario World. Once gliding, the character cannot turn around.
Peach possesses a similar ability in SSBM and SSBB, though it is not identical. Differences include the fact that it has timed usage, can be moved forward or back, and cannot change elevation. You can activate Peach's ability by holding onto the jump button after jumping.
To glide do a jump, then a midair one. If you continue holding down the jump button then you will start gliding. Or you can jump then at the peak of your jump, rapidly tilt the control stick/pad to also start gliding. It should be noted that Meta Knight can also start gliding by using his Shuttle Loop.
To control the glide, the user must tilt forward or downwards to angle downwards and backward or upwards to angle upwards. The characters will go faster if they angles downwards, and slower if they angles upwards. The glide ends if the characters attacks out of it or allows themselves to lose all momentum by angling upwards (known as stalling).
Charizard's glide is significantly slower than Meta Knight's and Pit's.
Since Shuttle Loop always starts a glide, Meta Knight can glide twice in one jump.
All three gliding characters have a unique aerial move when they attack out of gliding.
Gliding after using one's final mid-air jump will put one's character into a helpless state.
