My code isn't overwriting the text file, even though it should be?

We did a very similar type of code in C++ class but my version isn't working right, even though it is line-by-line (almost) the same.

My code is meant to save a user's Pokemon and they can add and delete as they please. My display function is working but my add and delete function are not. All the files are opening, but it's not overwriting the file like it's supposed to. Really unsure of what to do, I'm very much a beginner and I don't know much.

Here is what I've got so far:

string name[100];
string type[100];
int level[100];
string newPokemon;
string newType;
int newLevel;
ifstream fin;
ofstream fout;
int numberOfPokemon = 0;
//Input Pokemon Info
cout << "Name of Pokemon: ";
getline(cin, newPokemon);
cin.ignore(100, '\n');
cout << "Pokemon type: ";
getline(cin, newType);
cin.ignore(100, '\n');
cout << "Pokemon level: "; //weird gap between "Pokemon type" and "pokemon level". I have to press enter twice from "pokemon type" to get to "pokemon level"
cin >> newLevel;
cin.ignore(5, '\n');
fin.open("pokemon.txt");
//Put file in array
if (fin.is_open())
{
    while (isalnum(fin.peek()) && numberOfPokemon < 100)
    {
        getline(fin, name[numberOfPokemon]);
        getline(fin, type[numberOfPokemon]);
        fin >> level[numberOfPokemon];
        fin.ignore(100, '\n');
        if (name[numberOfPokemon] != newPokemon)
            numberOfPokemon++;
    }
    fin.close();
}
//Output file
fout.open("pokemon.txt");
if (fout.is_open())
{
    for (int i = 0; i < numberOfPokemon; i++)
    {
        fout << name[i] << "\n";
        fout << type[i] << "\n";
        fout << level[i] << "\n";

    }
    //Tack on new piece
    fout << newPokemon << "\n";
    fout << newType << "\n";
    fout << newLevel << "\n";
    fout.close();
    cout << "Add Successful\n";
}
else
{
    cout << "Add Failure\n";
}

and now my delete function:

string name[100];
string type[100];
int level[100];
int pokemonCount = 0;
string deletedPokemon = "";
bool found = false;

ifstream fin;

cout << "Which Pokemon would you like to delete?" << endl;
getline(cin, deletedPokemon);
cin.ignore(5, '\n');

fin.open("pokemon.txt");
if (fin.is_open())
{
    while (isalnum(fin.peek()))
    {
        getline(fin, name[pokemonCount]);
        getline(fin, type[pokemonCount]);
        fin >> level[pokemonCount];
        fin.clear();
        fin.ignore(100, '\n');
        if (deletedPokemon == name[pokemonCount])
        {
            pokemonCount--;
            found = true;
        }
        pokemonCount++;
    }
    fin.close();
    cout << "ya the file opened" << endl; //always appears
}

ofstream fout;
fout.open("pokemon.txt");
if (fout.is_open())
{
    for (int i = 0; i < pokemonCount; i++)
    {
        fout << name[i] << "\n";
        fout << type[i] << "\n";
        fout << level[i] << endl;
    }
    fout.close();
    cout << "pokemon removed\n";
    cout << "the file opened."; //it is returning that the file opened in both occasions in this function but nothing is happening!
}
else
{
   cout << "removal failure";
   cout << "The file didn't open";
}
return found;