There is no need to add characters to categories that are based on the character's colour. It's simply unnecessary, since it's pretty obvious what colours the characters are. Also some of the characters change colour after getting a different paint job, which makes it even more irrelevant.
Please stop adding unnecessary categories to articles. Categories should only be created if a decent number of articles will fit under them (at least 10). Categories for minor sponsors (like Leak Less, Nitroade, etc.) are unnecessary since there aren't very many articles that fit under them. You have been reminded by another user three times already. If you continue, you will be blocked.
Since I already made it clear to you that you may be blocked without further warning, the next time you added unnecessary categories to articles, I have gone ahead and blocked you for 1 week.
You may be able to request to have this block shortened or lifted, if you genuinely think that you can be trusted to stop adding unnecessary categories to articles, but if you continue to add unnecessary categories to articles, the block will resume, or you may be subjected to a longer lasting block.
Please stop adding nonexistent categories to articles. I noticed that you added a nonexistent category "Pickup trucks" to several articles, even though there is already a category of the same purpose "Pick up trucks". Please stop adding categories to articles if the categories don't exist. Please check to make sure a category exists before you add it to a page. If you do not stop, you will receive another warning, and should it continue beyond that you will be blocked. Please review our rules. Thank you.