Can a lion defeat a giant rat that can do a sonic roar

Firstly, it depends on the actual size of the rat. If the rat is 50 meters high, there is no way the lion can defeat it. If it were the same size as the lion, it would perhaps be a better fight. Secondly, it also depends on the power of the sonic blast, and what frequency it is at. If the frequency of the sonic is too high, it may have no effect on the lion. Similarly, the magnitude of the sonic roar also plays an important role. If the lion is not hungry, but views the rat as a trespasser, then a battle of roars will take place. If the rat can roar louder, then the lion will run away. However, if the lion is hungry, you can expect it to be more determined. Rats are naturally cowardly in nature, and may run away once it has incapacitated the lion.