The final battle in Brave Raideen is remarkably well done. Particularly awesome is the finishing blow, where Raideen, in its bird form, is stabbed through both its wings with two giant swords. So what does it do? It flies into the Big Bad, Demon Emperor Barao then moves upwards, dragging the blades through the monster's body and killing him.
The ending of the final episode of Reideen, seen here. Pulling your final weapon out of the Moon surely qualifies as your crowning moment.