This is about the boss. you may be looking for the character, or the other boss. Once-King Dalton is a boss in Chrono Trigger (DS) that appears in the Dimensional Vortex.
Dalton is still pretty easy. Despite having magic attacks that look like the ultimate attacks your characters use, they are unsurprisingly weaker in damage. When he is defeated, he will counter with a powered-up Burrrp!, which is unsurprisingly his strongest attack.