Any good tips for Triceracop (Story mode)?

[Levznik]

I reach wave 5 (some times) and then I die... How do I play with this character?]
(most of the time i reach wave 3/4)

[Rex-Wil]

He has the hardest Story Mode in my experience as well. Just keep trying and you should beat it eventually after several frustrating attempts.
Other than that I recommend practicing with him in practice mode where it shows the range of his attacks. You will notice that attacking at point blank range makes Triceracop move back as described, but attacking at max range hardly moves him at all or even moves him toward the enemies instead! Getting used to this can help you to attack foes at specific distances to try and steer Triceracop from danger. Such as waiting until the last possible moment to attack the first in a group to be pushed away, or attacking quickly to move towards an enemy.
Hope this helps! And remember to aim for the crotch