The Co-on in Zen

The four immeasurables are compassion, loving kindness, sympathetic joy and equanimity. Do these exist in all forms of Buddhism or is it specific to Vajrayana? Well, I didn't get far enough in terra vada to say from my own experience and I didn't study it so much. Maybe the equivalent in Zen is the co-on practice. But again, I just don't know enough about Zen because Ididn't get to those levels there with Zen.