From the Super Mario Wiki, the Mario encyclopedia
Zappa Mechakoopas are a blue variant of Mechakoopas that were introduced in the version 3.0.0 update for Super Mario Maker 2. They behave much like other Mechakoopa types, however, they repeatedly stop and fire beams of electricity which travel up to 20 blocks of open space. These beams of electricity are capable of destroying Brick Blocks and Rotating Blocks and activating POW Blocks. When enlarged with a Super Mushroom, their electricity beams will destroy any block that Big Mario is also capable of breaking. In the night theme, they gain rocket boosters, and can fly for a short period of time, like their normal and Blasta variants.