@mittymartz as you said he is a friend of yours, would you mind taking it up as a duty to ensure he takes his hygiene to a 100% before the month ends.
Remind him of the need to shave his pubic hairs.
Remind him to wash his clothes and sun them properly, as a friend you could get him a nice deodorant and body spray. This would go a long way ensure he has his bath and sponges himself well.
For the mouth odour, this days people rarely do not care about how they smell on your part remind him to brush his teeth with a good dental paste, if possible get him a mouth wash so he gargles and rinses his mouth every morning and evening. He should as well brush his teeth after consuming meals that enhances bad breath.