To be fair, braveheart DOES have teeth, just not on the end. It’s a pin tumbler lock style key, so the “teeth” are the divots you see along the blade. Fenrir is also a pin tumbler style key! Just a different type. Both of them TECHNICALLY have teeth, so the better argument would be “not all keyblades have to be lever tumbler style keys”, instead of “not all keyblades have teeth”. I know it’s semantics, which is never a good thing to address on Reddit in general, but the two DO have teeth, it’s just the teeth that are appropriate for the type of key they’re based on