The characters belonging to Hasbro are protected by copyright law you need a licence to monetize them. Even when they just appear for few frames. This is why in anime there is WcDonald's not McDonald's
This is also why selling fanarts is not so legal, but most of the time corporations don't care, because there are to much people selling them, so unusually they take down only the most well-known creators.
If you will get money of your comic where official characters appears you can be taken down or even sued