From Sonic Retro
- Purpose: Gives the Egg Walker more health points (an increase of 1/7 of its original health bar, about 14%).
- Location: Cosmic Wall. After climbing up the first tower that leads into the colony, drop down and land on the last platform on the left. There will be a missile on it. Fire the missile and cross to the other side where the missile went. The Protective Armor will be there.
- Requirements: Jet Engine.
- Required For: Nothing--it's purely a novelty item to allow Eggman to take more hits
- Equivalent: None.
|Character upgrades in Sonic Adventure 2|
|Sonic||Light Shoes | Ancient Light | Bounce Bracelet | Flame Ring | Mystic Melody | Magic Gloves|
|Tails||Booster | Bazooka | Laser Blaster | Mystic Melody|
|Knuckles||Shovel Claw | Air Necklace | Hammer Gloves | Sunglasses | Mystic Melody|
|Shadow||Air Shoes | Ancient Light | Mystic Melody | Flame Ring|
|Eggman||Jet Engine | Large Cannon | Protective Armor | Laser Blaster | Mystic Melody|
|Rouge||Pick Nails | Iron Boots | Mystic Melody | Treasure Scope|