Board Thread:Questions and Answers/@comment-5148639-20140104052433/@comment-25768001-20141222210308

walkatrout species has developes so far that he can flee from all their predators

every species  developes so far that they can live on their planet and the landscape there and that they can survive and dominate there

best example : galvan

so walkatrout isn't useless or the worst alien in the omnitrix

he can be used for fleeing when ben can't win and must go before he is defeated (because walkatrouts species have enhanced speed (he is fast enough to flee) and agility such as a slippery body he can flee)