

Press F8 to bring up the Beast Size Changer V2 Menu. You pick the size you want and you click Change Size. You can also use modifiers below the size ammount to modifiy who the size would be given to.
Sharks To Megalodons You can turn Sharks into Megalodons like from this guy's mod Megalodons in Gang Beasts
Sharks To Fishes You can turn Sharks into small Fishes, when they are small fishes you can pick them up.
Able to Pickup Sharks You can pickup sharks now and hold them.
Easy to pick up heavy things when big You can pick up heavy stuff when you are big this means that when you are big you can pick up Trawler Cage, Sharks, Elevators and more.
Birds You can now resize birds too.
Enjoy :)