So to Beat Funtime Freddy you need to check where he is. If he's East. He'll go West. West he'll go East.
But there's more.

If Funtime Freddy says.
"BonBon! Lets not keep our friend waiting!"
or
"Oh, Birthday Boy!"
He'll move Locations. East to West, West to East ;)
But if he Says.
"Get Ready for a Surp-prise!"
orrr
"B-Bo-Bon! go g-get him!"
That means He'll send BonBon to Attack. But if he says Surp-Prise! He'll send BonBon the opposite so East to West if he's West. and West to East if He's east.. :)

So I guess that's it that's how BonBon and Funtime Freddy Works.
Have fun~

Scott is Cool,
Scott is Life,
Scott is Coffee,
Scott is Surprising and Leave more
Yes the coffee one makes no sense what so ever XD