Strength is a move learned by certain Pokémon, and there are no cheat codes to instantly acquire it.
To get strength, you'll need to find a Pokémon that learns it and level it up to the appropriate level. Alternatively, you can use the move tutor in the game to teach certain Pokémon moves, including strength.
It's important to note that using cheat codes can potentially damage your game file and ruin your save data.
Remember, the fun of Pokemon is in the journey of catching, training, and battling your Pokemon. Enjoy the process!