Dynamic allocation each array element C++

I have this exercise for my class, I have a struct with "monster types", I need to dynamically allocate each monster from array, then I need to enter monster name and his type, sort by name monsters I introduced, and print them, and finally I need tot deallocate memory. Please help me. This is a part from my code.

int main()
{
            cout << "How many monsters do you want?: " << endl;
                int length;
                    cin >> length;

            Monster* miniMonsters = new Monster[length];

            for (int i = 0; i < length  ; ++i)
            {
                miniMonsters=new Monster[i];
            }

            enterMonster (miniMonsters , length);
                bubbleSort(miniMonsters, length);
                    printMonster(miniMonsters, length);


            for (int i = 0; i < length  ; ++i)
            {
                delete[] miniMonsters[i];
            }
                delete[] miniMonsters;
                miniMonsters = 0;

    return 0;
}