It gives spiky boy this:

4 speed

8 strength

2 brains

3 attack

8 defense

It gives the other thing this:

7 speed

6 strength

6 brains

8 attack

4 defense

It says spiky boi wins in this fashion

"Dacentrurus's bulk outmatches the Marsupial Lion. When the lion tires, Dacentrurus takes it out with a few swipes of its spiked tail."

Dacentrurus stomps

Dacentrurus brutally twists the catto's windpipe and cuts the jugular vein. Then Dacentrurus stomps.