What can be Blocked by the Hylian and Deku Shields

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.

While Marth and Roy have essentially identical animations, basically none of their moves are the same. The majority of Marth's attacks deal more damage when the tip of his sword hits, while by contrast the tip of Roy's sword is ridicuously weak.

I'm not a competitive player, but this alone is probably one of the reasons the Marth is better in tournaments than Roy. Marth is rewarded for staying in the zone where his attacks can just barely reach the opponent, where tourney-goers love to be since it puts you as far from danger as possible while still hitting. By contrast, Roy is punished for being in this zone, so he has to get in there and open himself up to more attacks.