Thunderclump
Dunderklumpen! (original)
Dunderklumpen lives all alone in the mountains of Jämtland. One Midsummer's Eve when he feels very lonely he sets off on a journey to find friends.
Starring Beppe Wolgers, Jens Wolgers, Halvar Björk, Håkan Serner, Gösta Ekman, Toots Thielemans, Lotten Strömstedt, Sif Ruud, Birgitta Andersson, Stig Grybe
Watch "Thunderclump" on Tubi TV released in 1974. It's a animation and kids movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.