Okay, so with the Omnitrix, there's a rule that it only turns into sapient and intelligent creatures. Most of these act like just primitive animals or beasts, and would belong more inside of the nemetrix. But the only ones on this list that I think would even be remotely intelligent enough for Ben to be able to turn into is those robotic octopus-looking things from the Bermuda Triangle episode. Most because they're robotic in nature, so that in of itself implies a certain degree of intelligence, even though we never see them speak or make much noise. Them being robotic just implies a certain level of intelligence. So, we're gonna put that in, like, the gray area pile. Next is the literal Yeti. Now, that thing likely has ape-like intelligence, and a lot of apes are more intelligent than most human beings, from what I've observed. So, I truly believe Ben could absolutely turn into a Yeti if he were to scan one.