Chopper will learn Fishman Karate from Jinbe. Why do I say this? Chopper is the only straw hat that doesn't have a distinctive fighting style, meaning he is not good at any one combat ability. Yeah he has different transformations but nothing sticks out except monster point and that's only because he is big. This is probably why his bounty and epithet both suck because he is not memorable. The rumble ball is cool and let chopper survive the paradise islands. His new transformations are cool but I can't see them being of any use against a New World enemy. For example, without monster point could chopper take anybody from the Donquixote family? No he can't, and he's going to have to be able to compete with the lower main crew of other ships When he uses the now controllable monster point it only has a three minute time limit and leaves chopper unable to defend himself afterwards. All of this means that Choppers transformations alone aren't going to cut it in 1v1 fights and he needs to learn a new skill. Chopper will learn Fishman Karate because 1. He will realize that he needs a new skill and Jinbe will be his crewmate. He will try to find a fighting identity and Jinbe is the most suited of the SH to help him. 2. It is foreshadowed that chopper is interested in martial arts because of Kung fu point. Fishman Karate will make this point obsolete. 3. If someone has never met Chopper, they never can tell exactly what he is and he wasn't excepted growing up. He will be a Human Doctor who is a reindeer that uses Fishman Karate. This will make him extremely different and even more of a monster that he has been claimed to be. Being different is a theme for chopper. Now I also theorize that in order to use Fishman Karate you have to have thumbs. I think that's why only some Fishman can use it but humans can too. Chopper only has thumbs in his human/heavy point and in his monster form. This means that chopper will fight in his human form because that's when he can use FK. Meaning from a combat stand point it wouldn't make since for chopper to use his other forms! His monster point also becomes relavent because FK should make it extremely devastating and worth being able to only fight three minutes and the rumple ball will still be useful. For all of this to go down Chopper will either lose a 1v1 fight or have to be saved. So expect chopper to be in a serious fight soon.