Super Smash Bros. Melee/Link

Auto Block
Link automatically blocks projectiles with his shield just by standing still, if the projectiles are at the correct height. Ducking will also accomplish the same thing. Samus’s Charge Shot, Bob-ombs, almost anything. Link can not use this ability while holding items, (because he holds them with his right hand and puts his shield on his back).

Bomb Jump
Link also has the ability to bomb jump, but it is not quite as effective and much more difficult to pull off. Basically once you’re off the edge (from being hit), pull a bomb out, throw it, and proceed to jump and up B, if you do it correctly then the bomb will blow up on you and you will be able to perform another up B move.

Boomerang hookshot glitch
In 1.0, it is possible to throw a boomerang and hookshot a ledge. When the boomerang comes back Link will shoot up impossibly high into the air. This glitch is fixed in later versions (Player's Choice, PAL/European)

Quick Recovery
When using Link or Young Link's Aerial   move, immediately pressing  when the point of the blade touches will speed up the recovery time from the attack.

Wall Grapple
When using Link, Young Link, or Samus, pressing Z or A+L or A+R to use the character's hookshot (Link and Young Link) or grappling beam (Samus). This can be done during the aforementioned characters' air dodges. It can connect to most solid ledges or walls and will allow the character to hang there; pressing A reels the character back up towards the stage. A triple jump attack (Up+B) can be performed immediately afterwards. The air dodge can be used to position the character properly before using this recovery technique, since the hookshot/grappling beam will not connect if the character is too close or far from a wall. If it hits an enemy it does some damage and has minimal knockback.

In general, this move is superior to the Up+B for recovery, except in stages like DK 64 where it won't work.