Yes you can, however why would you? you can also adjust the slack to make it into a regular hub.
yes you can the only operating diferences between a freecoaster and a cassette/freewheel is that on a freecoaster you can travel backwards without having to backpedal to accomodate the natural backpedaling a cassette/freewheel does and with freecoasters there is a usually adjustable amount of slack when you pedal before the bike starts to travel forwards :)
You can either pedal backwards while riding fakie, or buy a freecoaster hub which doesn't require any sort of pedaling while you ride fakie.
freecoaster
The main difference between a BMX freecoaster and a cassette hub is how they engage when pedaling backward. A freecoaster allows you to pedal backward without the cranks moving, while a cassette hub engages immediately when you pedal backward. If you prefer doing tricks that involve pedaling backward or fakie tricks, a freecoaster would be more suitable for your riding style. If you prefer a more immediate engagement when pedaling backward, a cassette hub would be a better choice.
If the cycle has a fixed wheel with no release ratchet then it will go in reverse when you pedal backwards.
A freewheel will let the wheel roll forward w/o the pedals moving, but will pull on the pedals when the wheel is rolled backwards. A freecoaster hub can be rolled backwards w/o pulling on the pedals.
When you pedal backwards, the tension in the chain is reduced, causing it to slip off the gears or sprockets. This can happen if the chain is loose or if the gears are not aligned properly.
you need a special wheel that has a "coaster brake"
A freecoaster hub is a type of bicycle hub that allows the rider to coast without pedaling backward. It differs from a traditional cassette hub in that it has a clutch mechanism that disengages the hub when coasting, eliminating the need to pedal backward to engage the hub. This design feature allows for smoother and more controlled riding, especially during tricks and maneuvers.
Fixie bike are bikes (usually road bike frames) that have a fixed rear sprocket which allows you to pedal forward like normal, but does not allow you to just coast . If you pedal backwards it goes backwards if you pedal slow it will remain slow. The whole point of a fixie is to eliminate brakes shifters to simplify a road bike.
To revert or ride backwards you need to pedal backwards with the chain and the speed of the wheel and then when you get to the right time you can twist around either doing a bronco or fakie or a wheelie around commonly known as a half cab.
A freecoaster BMX is a type of BMX hub that allows the rider to coast backward without pedaling. This differs from a traditional BMX hub, which engages the pedals when the bike is moving backward.