Implement hitstun and knockback.

src/input/gamecube/bridge.rs

@@ -171,10 +171,10 @@ pub fn gc_event_system(
                 }
             };
         }
-        digital!(a, GamepadButton::South);
-        digital!(b, GamepadButton::West);
-        digital!(x, GamepadButton::East);
-        digital!(y, GamepadButton::North);
+        digital!(a, GamepadButton::East);
+        digital!(b, GamepadButton::South);
+        digital!(x, GamepadButton::North);
+        digital!(y, GamepadButton::West);
         digital!(z, GamepadButton::Z);
         digital!(start, GamepadButton::Start);
         digital!(dpad_up, GamepadButton::DPadUp);

src/input/mod.rs

@@ -272,7 +272,7 @@ fn read_local_inputs(
             Some((_, LocalInputSource::Gamepad(_))) => gamepad
                 .map(|pad| gamepad::sample_gamepad(pad, &input_map))
                 .unwrap_or_default(),
-            None => FighterInputFrame::default()
+            None => FighterInputFrame::default(),
         };
 
         // preprocess frame