Sonic Pain Wave

The Sonic Pain Wave is an ability used by Megatron in the RiD continuity family

While in his bat mode Megatron was able to emit what he described as his "sonic pain wave" from his wings, like most RiD abilitys, it is voice activated. It takes the form of blue beems emitted from his bat wings, it causes pain in organic lifeforms. Whether it causes pain in Transformers is unknown.

Animated continuity
When Megatron arived on earth in search of energy, he kidnapped Doctor Onishi. When the doctor refused, Megatron transformed to bat mode and used his sonic pain wave causing pain in the humans. The Soinc Pian Wave was never used again.