Full shields:
Hold L + R on controller one, then press A on controller two.

Full ammunition:
Hold L + R on controller one, then press C on controller two.

Recharge generator:
Hold L + R on controller one, then press B on controller two.

Weapon power-up:
Hold L + R on controller one, then press X on controller two.

Obtain level item:
Hold L + R on controller one, then press Y on controller two.

Load map:
Hold L + R on controller one, then press Z on controller two.

Level skip:
Hold L + R on controller one, then press Start on controller two.