In both Ben 10 and Ben 10: Alien Force, animals are introduced. The animals come from either Earth or another planet. The categories are listed below:

A

• Alien Animals
• Alien Sea Creatures

B

C

D

E

F

G

• Galvan B Animals

H

I

J

K

L

M

N

• Non-alien Animals
• Null Guardians
  
• Null Void Animals

O

P

• Prehistoric Animals

Q

R

S

T

U

V

• Vulpin Animals

W

X

Y

Z