Squirrel Girl vs Longshot Vs Shamrock

Can there be a winner out of this group or is a stalemate inevitable?

Yes, and the winner is SG

Longshot's full of fail.

PIS is the power they all have but Squirrel Girl is the best at it.

SQG

Squirrel defeated Thanos.
That's an auto-win in my book.

Squirrel Girl wins