Bedding for my hamster??

I personally use Carefresh for my hammy cage. Actually, it's Carefresh ultra mixed with lavendar and pink Carefresh. Yes, I have a girl hamster. The toilet paper is fine, although I would think the cage needs cleaning far more often to keep the odor at bay. Wynnie gets a few sheets of t.p. to shred every time I clean her cage.

Oh, whoops
What I meant when I said bedding is what they make a bed out of. Like inside a little house that they sleep in. I should have been more specific. Sorry about that.

Plain white toilet paper is the best choice as your brother is using.

Tell your brother what he's doing is fine. Plain white unscented toilet paper is perfectly safe for hammies. Definitely do not get any of that bedding fluff you often find in pet stores.

For my hamsters or gerbils I would lay down a layer of fine wood shavings or carefresh and then add a whole roll of cheap unscented toilet paper for the gerbils or around 10-20sheets for the 2 dwarf hamsters. The gerbils chewed far more than the hamsters. For awhile I had a paper shredder and just shredded white paper and newspaper for bedding. Don't use anything with printer ink on it. Hamsters aren't really picky about their bedding so long as you make sure they have something soft to build a nest out of but don't use cedar shavings or that fluff sold in petstores. Many hamsters have lost their legs getting tangled in fluff beddings.

For the actual bedding for my gerbils, I use a mixture of aspen and critter care. Then for their nests, I use plain white unscented toilet paper. They love it. I have done the same when I have had hammies.