Убираю входной параметр power в классе Robot, возникает ошибка power is not defined

class Bug {
    constructor(name, phrase, power) {
        this.name = name
        this.phrase = phrase
        this.power = power
        this.species = "bug"
    }
    hide = () => console.log("You can't catch me now!")
    sayPhrase = () => console.log(this.phrase)
    attack = () => console.log(`I'm attacking with a power of ${this.power}`)
}
 
class Robot {
    constructor(name, phrase, power) {
        this.name = name
        this.phrase = phrase
        this.power = power
        this.species = "robot"
    }
    transform = () => console.log("Optimus prime!")
    sayPhrase = () => console.log(this.phrase)
    attack = () => console.log(`I'm attacking with a power of ${this.power}`)
}
 
const bug1 = new Bug("Buggy", "Your debugger doesn't work with me!", 10)
const Robot1 = new Robot("Tito", "I can cook, swim and dance!", 15)
 
console.log(bug1.power)
Robot1.attack()

class Bug {
    constructor(name, phrase, power) {
        this.name = name
        this.phrase = phrase
        this.power = power
        this.species = "bug"
    }
    hide = () => console.log("You can't catch me now!")
    sayPhrase = () => console.log(this.phrase)
    attack = () => console.log(`I'm attacking with a power of ${this.power}`)
}
 
class Robot {
    //constructor(name, phrase, power) {
    constructor(name, phrase) {
        this.name = name
        this.phrase = phrase
        this.power = power
        this.species = "robot"
    }
    transform = () => console.log("Optimus prime!")
    sayPhrase = () => console.log(this.phrase)
    attack = () => console.log(`I'm attacking with a power of ${this.power}`)
}
 
const bug1 = new Bug("Buggy", "Your debugger doesn't work with me!", 10)
console.log(bug1.power)
const Robot1 = new Robot("Tito", "I can cook, swim and dance!", 15)
 
 
Robot1.attack()

class Parent {
    constructor(name, phrase, power, species) {
        this.name = name;
        this.phrase = phrase;
        this.power = power;
        this.species = species;
    }
 
    sayPhrase() {
        console.log(this.phrase);
    }
 
    attack() {
        console.log(`I'm attacking with a power of ${this.power}`);
    }
}
 
class Bug extends Parent {
    constructor(name, phrase, power) {
        super(name, phrase, power, "bug");
    }
 
    hide() {
        console.log("You can't catch me now!");
    }
}
 
class Robot extends Parent {
    constructor(name, phrase, power) {
        super(name, phrase, power, "robot");
    }
 
    transform() {
        console.log("Optimus Prime!");
    }
}
 
const bug1 = new Bug("Buggy", "Your debugger doesn't work with me!", 10);
const robot1 = new Robot("Tito", "I can cook, swim, and dance!", 15);
 
console.log(bug1.power);
robot1.attack();