Bad Future -
Betrayed, is probably one of the most impactful endings to the series, although not necessarily canonical, it's hard to not be so.. alarmed? Angry? Sad? At seeing all the work you've put into Breaking a Bank, getting out of jail, robbing a diamond, infiltrating an airship, and then seeing it all go to waste by the man who you took his power, and having it be taken right back.
With all the silly outcomes and cool references that the series has stayed consistent with pulling off, I can't help but feel bad for Stickmin.
Wonderful song that pulls off all these feelings.