When its HP drops to half or less, the Pokémon's shell breaks and it becomes aggressive.
Effect
When this Pokémon enters battle and at the end of each turn, if its HP is 50% or above, it changes into Meteor Form; otherwise, it changes into Core Form. In Meteor Form, it cannot be given a major status ailment (though existing ones are not cured), cannot become drowsy from yawn, and cannot use rest (which will simply fail). This ability cannot be copied, replaced, or nullified. This ability only takes effect for Minior.
Pokémon with this ability (14)
#774
Minior
#10130
Minior
Orange Meteor
#10131
Minior
Yellow Meteor
#10132
Minior
Green Meteor
#10133
Minior
Blue Meteor
#10134
Minior
Indigo Meteor
#10135
Minior
Violet Meteor
#774
Minior
Red
#774
Minior
Orange
#774
Minior
Yellow
#774
Minior
Green
#774
Minior
Blue
#774
Minior
Indigo
#774
Minior
Violet