Potsy is a ghost elephant who haunts the museum in Ghostbusters Beeline (Mobile app). He attacks by shooting electricity and lands where you stand. The only way to survive his attack is to keep moving. It requires strategy to beat Potsy. Your best bet is to lure him away from you by using your Slime Decoy and use a grenade to stun him, then use proton streams on him. Repeat the process to capture him.
Tobin's Spirit Guide
As mentioned above, Potsy can shoot electricity, from either his trunk or by stomping to cause lightning to come down overhead.