Falcon is a Uncommon Beast-type fruit in Blox Fruits. It is a relatively inexpensive and simple to obtain Falcon fruit. It costs $300,000, or 650 Robux, and has a 11% chance of being in stock, so you can get it any time. It has a spawning chance of 9.5%, so there is a high chance that you will find it while playing.
Blox Fruits Falcon is a really bad fruit. When you compare the cost of it with the value that you will get, you will notice that it is really bad. It is not hard to get it while playing, but still, there are better options. The problem with Falcon is that it has a small hit box and a small amount of AOE, which makes it really bad for fast leveling, farming, and PVP. So use it only if you have to or want to have fun.
What combo you will use with Falcon depends on your in-game situation, who you are fighting with, and what you want to achieve. It is best to spend some time testing all possible combos, and by doing that, you will learn how to use what works best for you and also how to counter it. So go and test Falcon in a game.