It seems there is a more fundamental issue here - WHY are you tutoring him? If he doesn't want it, then you should speak to his parents and determine whether they are the ones that want him to learn rather than the boy himself. As they say "You can lead a horse to water, but you can't make him drink."
If you really do want to persist with him, and assuming what you are offering meets his needs and is of interest to him, then I'd suggest you start pretending you don't speak Chinese, and refuse to talk to him in anything other than English. Since he is in Grade 6, there's no reason he shouldn't be able to follow you if he's already had a few years of lessons at school.
You could use the cartoon as a talking point - but only in English. Ask him questions about what happens, the names of characters, what they look like, their personalities/interests/friends etc, some of the stories. Once you have some answers from him, you can use these to build up his vocabulary e.g. feelings, colours, hobbies, actions, etc. You may be able to put together some basic stories using the characters for him to read and, in time, he might be able to write his own stories. Later it may be possible to introduce other cartoons or folk tales etc. that have similar story lines. He could subsequently write to an English-speaking friend (pen pal) about his interests and build a broader range of conversations from there. If you have Internet access there are lots of resources to create your own cartoons or better, for him to do so.
Good luck with this challenging student,"