The End of the Golden Weather 1991 one on netflix

Family drama set in New Zealand about Geoff Crome, a young boy (Fulford) who immerses himself in his own private fantasy world where he meets Firpo (Papps), a strange being who dreams of being an Olympic athlete. Together, the two begin a close friendship as Geoff attempts to help Firpo realise his dream. However, it is not long until the adult world begins to impinge on his fantasy.