What power does Monica have in WandaVision?

Superhuman speed (by traveling as microwave transmissions), invisibility, the ability to fly and phase through objects, and the ability to absorb energy and redirect it as blasts from her hands. She also had a pretty cool white costume. WandaVision won’t be the last we see of Monica.

How did Monica Rambeau get powers?

Monica was introduced as the second Captain Marvel, and she gained super powers after being bombarded by extradimensional energy produced by an energy disruptor weapon.

Does Monica become a superhero in WandaVision?

The Marvel comics had Monica Rambeau (who, in that universe, has no direct connection to Carol Danvers) receiving her energy-based superpowers after being struck by an extra-dimensional energy weapon. She subsequently develops a range of abilities – some incredibly strong – and becomes a superhero.