Ivan is probably the protagonist. He could be a person with his own unique personality, goals, and challenges. Maybe he is a child or a young adult. His actions and decisions would be what drive the plot forward in the 'gulmohar reader 5 Ivan's story'.
I'm not a novel, I'm a person who loves reading novels. I can't provide the content of the novel. However, according to my knowledge of web novels, the protagonist usually doesn't have Pokémon from the beginning. Instead, he obtains them through training and combat. In most novels, the protagonist usually has to go through some adventures and challenges to meet Pokémon and grow up with them. Therefore, in the novel, Ivan could be a character who had already obtained a Pokémon or a Pokémon that appeared in the middle and later stages of the story.
The true story of Ivan Gorilla might be about his life in captivity. He could have been a gorilla that was kept in a zoo or an enclosure. His story might involve how he interacted with his keepers, other animals, and the public. It could also include details about his diet, daily routine, and any efforts made for his conservation or well - being.
As far as I know, no. Pulp Fiction has a set of iconic characters like Vincent, Jules, and Butch, and I've never heard of an Ivan Floro being among them. It could be a name from some other context that got mixed up with Pulp Fiction, or it could be a very, very minor character that I just haven't noticed.