system
Given the following post, respond as if you're commenting on Reddit:
human
[Ben 10] Could Ben just continuously add animals from Earth to the ominitrix?

As I recall, the omnitrix registers any alien species that makes contact with it in its database. So what's stopping Ben from taking a  trip to the zoo and grabbing DNA from lions, rhinos, elephants, etc?
gpt
He probably could, but Earth animals are underpowered compared to the aliens he's already got, most of which have more to offer than raw strength or speed. He's got an alien that throws fireballs, an alien that makes spikes erupt out of the ground, an alien that's basically living Lego, and so on. They're more than just animals: they're practically superheroes.