since in the novel he was the rumored person with one of the strongest attack power I think or something about his flames and stuff they should have mad their fight at least 2-3 chapters it was to quick ://
his not showing that he is a summoner too While fitting the blue guy he said "he didn't(the blue guy) know that on my flame there has a calamity flame (which is flame belly)"
The fight with the Spain in the novel is much more detailed. They didn't even showed flame belle possessing the MC.