Super Smash Bros. Melee/Sheik

Basic Techniques
Hold A after a stage has been selected (or in single player, during the matchup screen) to switch between Zelda and Sheik before the match starts.

Switching between Zelda and Sheik
An effective Zelda/Sheik game revolves around knowing when to transform. As a general rule of thumb, Sheik is better at racking up damage while Zelda provides the finishing attacks. However, Sheik's forward aerial and up aerial are great kill moves, and Zelda's lack of speed can make it difficult to land any attacks. When recovering, Sheik's jump is better than Zelda's, so it is important to transform only after you have used Sheik's second jump.

Advantages of Zelda

 * 1) More powerful moves, especially Smash attacks.
 * 2) Great aerial attacks (particularly the lightning kick).
 * 3) Greater distance covered with   and less lag.
 * 4) Reflective ability.
 * 5) Long distance projectile Forward.
 * 6) Floatiness useful in recovering

Advantages of Sheik

 * 1) Quicker moves and movement.
 * 2) Equally great but faster aerial attacks (including a better-than-average sex kick).
 * 3) Better skill with melee weapons (two hits).
 * 4) Great juggling and edge guard techniques.
 * 5) More powerful +.
 * 6) Great attack range, particularly that of smash attacks.
 * 7) Better and less laggy long range attacks
 * 8) Significantly better ground game than Zelda

It is also worth noting Sheik is lighter than Zelda.