PSI Shield, written as PSIShield in EarthBound Beginnings, (Japanese: サイコシールドPsycho Shield) is a PSI ability in all three Mother games. It protects a single conscious character, or all characters, from enemy PSI-based attacks, and even returns some of the blocked damage to the attacker at higher power levels. PSI Shield is learned in EarthBound Beginnings by Ninten and Ana, in EarthBound by Paula, and in Mother 3 by Lucas. In Earthbound, some PSI attacks can lower it's defense by 1 (its default is 3) except PK Thunder, which instantly causes it to be destroyed.
Dissipates the enemy's PSI offensive attack if it hits at it.
Protects one person with a psychic shield. It blocks an enemy's PSI attack. Using a different shield will cancel these effects.
Σ
Paula, Buzz Buzz
24
To all of us
N/A
PSI Shield covers everyone in the group.
Protects everyone with a psychic shield. It blocks an enemy's PSI attack. Using a different shield will cancel these effects.
β
Paula
14
To one of us
N/A
"Psychic Power Shield." PSI Shield α plus reflection.
Protects one person with a psychic power shield. It reflects an enemy's PSI attack back at the attacker. Using a different shield will cancel these effects.
Ω
Paula
42
To all of us
N/A
"Psychic Power Shield" covers everyone in the group.
Protects everyone with a psychic power shield. It reflects an enemy's PSI attack back at the attacker. Using a different shield will cancel these effects.
In Mother 3 (PSI Shield)[]
Level
Users
PP Cost
Target
Effect
Description
α
Lucas level 28
8
To one of us
PSI Protection
Halves PSI damage to one ally. Some attacks can't be halved, however.
Ω
Lucas level
45
20
To all of us
PSI Protection
Halves PSI damage to all allies. Some attacks can't be halved, however.
In Mother 3 (PSI Counter)[]
Level
Users
PP Cost
Target
Effect
Description
α
Lucas level 33
18
To one of us
Counters PSI Damage
Reflects PSI damage dealt to one ally. Some attacks can't be reflected, however.
Ω
Lucas level 53
34
To all of us
Counters PSI Damage
Reflects PSI damage dealt to all allies. Some attacks can't be reflected, however.