Ben 10 (Classic)
The Ultimate Weapon
S2 E8:
When Max finds out that part of an alien weapon has been unearthed in Texas, he becomes obsessed with finding it. In doing so, he leads Ben and Gwen on a wild adventure as they must battle the Forever Knights to see who will get the weapon first. An action packed chase leads everyone down to a Mayan Temple in Mexico and the revelation that the weapon is now meaningless.