You may remember The Returners, a group who performs video game marathons for charities, and earlier this year ran through all 13 Zelda games in 72 hours to support the Multiple Sclerosis Foundation.

Well, they’re back, and this time it’s the Super Smash Bros series. They will be playing all three Smash Bros games for 48 hours attempting to collect as many trophies as possible, while also taking Brawl challenges from viewers, for $5 per match.

This time they are raising money for a cure for Multiple Myeloma. It starts on June 6th at 6PM, so tune in then to watch some exciting Brawl matches.