oh .Well. For the last cuscene, you must engage the size changing squirrel (Dustin)in a brutal battell of dodging acorns,without getting hit :P.(btw a hint about that ratatta. its actually her :p)
So if you want to get that cutscene, you have to :1. finish the normal training(if you did, skip to the part 2 :p):
Part 1.
Talk to the squirrel(Dustin)
Then you will get this
Then talk to the squirrel(Dustin) again and finish the training routine :p(tho dont get hit more then 3 times,as it will force you to do it again :P)
Part 2.
If you beat the normal routine,then talk to the squirrel(Dustin) again.You should get this :P
Now for the cutscene you will have to beat novice routine without getting hit :P(warning:its a pain in the ass).Btw if you want to see the coutscene ,just ask.