Funny, for altogether he is the one I drew least frequently (not on those two pages I posted here but as a whole). However, he is also the only one of whom there is a freehand drawing on the two pages I posted. The image of him attacking a sharptooth's eye (I certainly drew this because there was such a scene in the fanfiction I wrote back then) is the only one for which I didn't copy any movie shot.
I do not recall every single o those images, but most of them.
Petrie from the upper left is from LBT 3 ("We no act like that!") the Littlefoot face right of that is from the same movie (the scene when Cera's father forbade her to hang around with Littlefoot, the moment when she walks towards him from behind Littlefoot). I cannot pinpoint the Ducky head to the right, but I'm quite sure it is from a similar scene of the same movie. The smiling and shrugging Ducky on the right just told Littlefoot that he is not an influence whatever that might be
The two Littlefoot heads with Ducky respectively Ducky and Petrie on his head as well as the Spike with Petrie on his head and the sad looking Cera are all from the scenes that go along with the song "Kids like us". The other Spike on that page is from the LBT 3 scene when they spot the raptors.
On the lower page LBT 5 comes in, but I cannot account for all those Littlefoot heads. The one to the left (which looks somewhat distorted; I did a bad job on that one) is from the moment after Cera proclaimed that she didn't want to hang around with threehorns only for they were to bossy. The surprised Looking Littlefoot right of that one is from the moment when he just heard Spike sniffing (smelling the Big Water). The angry looking Ducky below those two is from the scene when Spike almost ate her at the beginning of the movie. I don't remember about the other pictures on that page, but they are definitely not freehand. I suppose most of them to be from LBT 5 as well.