>>716514841
Squirrel Girl didn't fight Galactus, she just talked him down with the power of friendship.
>>716516791
This is true, a large park of Squirrel Girl's gimmick aside from the genkiness is that she defeats villains way above her power level.
The only person to ever defeat her is Kraven the Hunter, and that's because he's very specifically specced to beat heros like her.
The second time they fight shortly after she talks him down with the power of friendship too.