Special about Yoshi’s Egg Shield

There are 2 types of Powershielding. When you enter full-shield, the following happens:

1. The first 2 frames are ineffective
2. The next 2 frames are used to Powershield projectiles and physical hits
3. The next 2 frames only Powershield physical hits

Against Projectiles:

• Time Window is 2 frames
• Knockback is cancelled
• Hitlag is cancelled
• Projectile ownership becomes yours
• Projectile damage is halved
• Projectile is sent back in the opposite trajectory

Against Physical Hits:

• Time Window is 4 frames
• Knockback is increased
• Shield is cancelled (means you can do anything you want after Powershielding)

Also if your Full Shield get hits by a projectile on the 5th frame, it won't get Powershielded, but as long as you remain in shield mode, the next physical hit you receive will be Powershielded, even if you switch to Light-Shield.

In Super Smash Bros Melee, a character can wavedash by doing a diagonal downward air dodge when just above a platform. This causes the character to slide along the platform in the direction of the dodge. Players often accomplish this by doing a short hop and then immediately dodging in the desired direction.

This move is very difficult to pull off consistently, but players who can do it will sometimes use it instead of a roll. Wavedashes are often better than rolls because there are fewer recovery frames, or frames when the character is vulnerable between the part of the dodge when the character is invincible and when the character can do anything else.

This move is an unintentional side effect of interactions between different parts of the physics engine, and was not even discovered for years after the game came out. You can not wavedash in Brawl simply because it has a different physics engine. In particular, air dodging works differently in Brawl.