The title is self explanatory, so I'll go ahead and begin.
Rurouni Kenshin
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The epic battle between Himura Kenshin and Makoto Shishio. I liked it due to the fact that several battles took place in one.</div>
Naruto
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The battle in the Valley of the End where Uzumaki Naruto fought against Uchiha Sasuke.</div>
Cowboy Bebop
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The last episode when Spike defeats Vicious and recalls Julia's final words to him before descending the staircase, where he is confronted by the remainder of the Red Dragons who seem stunned at the defeat of their new leader. Mimicking a gun with his fingers Spike utters the word "Bang" smiles and collapses</div>
Rurouni Kenshin
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The epic battle between Himura Kenshin and Makoto Shishio. I liked it due to the fact that several battles took place in one.</div>
Naruto
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The battle in the Valley of the End where Uzumaki Naruto fought against Uchiha Sasuke.</div>
Cowboy Bebop
<div class='spoiler_toggle'>Spoiler: click to toggle</div><div class="spoiler" style="display:none;">The last episode when Spike defeats Vicious and recalls Julia's final words to him before descending the staircase, where he is confronted by the remainder of the Red Dragons who seem stunned at the defeat of their new leader. Mimicking a gun with his fingers Spike utters the word "Bang" smiles and collapses</div>