While the gameplay, hold X + R1 + L1 and then you can use one of the following combinations to set the following options on maximum:
Xombium Bottle: Right, Right, Up, Up, R2, Left, Right, R2, Right, Up, Right, R2.
Health: Down, Down, Down, R2, Up, Up, Down, Up, R2.
Ammo For Ranged Weapons: Left, Left, Up, Down, Right, Left, Right, Right, R2.
Ammo for Current Weapon: Right, Right, Down, Up, Left, Right, Left, Left, R2.
Shotgun Ammo: Left, Left, Left, Down, Down, Down.
Suicide: Down, Down, Down, Down.