From Dragon Quest Wiki
Can Opener is a technique in the Dragon Quest series. It deals 50% more damage to machines.
Dragon Quest VIII 3DS
Can Opener is learned by Morrie after investing 22 points into his Claws skillset. It deals 150% more damage to monsters of both the Material and Machine monster families.
Dragon Quest IX
This ability is learned with 13 skill points allocated into Claw skill.
Dragon Quest XI: Echoes of an Elusive Age
Jade and Rab learn the skill for 9 and 8 points respectively. It costs 4 MP to perform and deals 300% damage (plus 10) to rust buckets, 200% to all other monster groups.
HP recovery skills
MP recovery skills
Ailment alleviating skills
Bonus damage skills
Turn order skills
Physical support skills
Magical support skills
Songs and hymnal skills
Dances and shimmy skills
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