US Immigration Lottery is only for Immigration purposes. But if the intended touring is ... Gambling related, then I cannot guide you.
Therefore, if your brother has this strong desire, to be a routine Tourist, meaning, "travel" abroad ... not with the intent of jumping the visa restrictions and becoming an unregistered alien .. its proper, that he should seek relevant "Visas" for his intended tourist destination/s.
Because, for example, a tourist can return in about three months ... But Immigrating to Canada, does not allow the Immigrant to leave Canada for the initial three years period ... unless thats what your friend means by travel abroad.