When Harry Brewis, better known online by his YouTube nom de guerre HBomberguy, fired up his marathon Twitch stream, his viewers knew right away that he was raising money for a charity that supports trans and genderqueer youth. What they weren’t expecting was a visit from freshman US Representative Alexandria Ocasio-Cortez Sunday night.

Hbomberguy’s goal Sunday was to raise $250,000 USD for the UK-based charity Mermaids, which works to provide family and individual support for gender-diverse and trans youth. The game he’d chosen to take on was Donkey Kong 64.

Ocasio-Cortez, who represents New York’s 14th district, called in to chat a bit about the issues facing trans people, but she reminisced about her fondness for the Nintendo 64 as well – while she never owned the console, she remembered playing Pokemon Snap and Super Mario 64 at her cousin’s house, and thinks of the Nintendo 64 as “probably the best system out of all them.”

But while Hbomberguy struggled through Donkey Kong 64, Ocasio-Cortez also talked about the economic issues trans people deal with. Income inequality has been a central point of her stump speech since she began her campaign for Congress, but she said that is felt more keenly by members of marginalized communities.