Activating this trainer:

Press F1 at main menu.

Listen for 'Trainer Activated'.

Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options:

Numpad 1: God Mode

Numpad 2: Coin Multiplier

Numpad 3: Super Coin/Lives

Numpad 4: Fun Mode

Numpad 5: Unlimited Jumps

Notes:

Numpad 1: God Mode - toggle on and while in the game your health stays full.  Basically nothing can kill you except if you fall off the map or into areas that you cannot get back up.  If THAT happens, turn this off and let Lucky die so you can continue, or use the Unlimited Jumps option below to get back up.

Numpad 2: Coin Multiplier - toggle this on and each coin you pick up is worth 10 instead of just 1.

Numpad 3: Super Coin/Lives - toggle this on and when you pick up a coin, it's worth 300 PLUS it gives you another free life.  You can use this to give you a ton of extra lives and run up a large coin score.

Numpad 4: Fun Mode - this option does many things.  First it gives you 99 lives if you die.  Also it gives you 99 coins constantly.  However the most useful is that it unlocks all 4 worlds to play, and also unlocks all the doors that allow you to enter the various levels in the game.  Toggle on at main menu then enter the game and then you can also enter the MENU while in the game to select another world.  This will let you get to the end mission of each game quickly or to get into places you want to try out without having to play the entire game. You can literally toggle this on, enter the 4th world, then go back to the entrance of the final mission and play it right at the start of the game.

Numpad 5: Unlimited Jumps - toggle this on and Lucky can stay airborne as long as you like, avoid falling, get to hard to reach places, and avoid many dangers and attacks.