Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:
NumPad-: Super Speed

Trainer Options:
NumPad1: Infinite Health
NumPad2: One Hit Kills
NumPad3: Freeze Timer
NumPad4: Money Multiplier
NumPad5: Perfect Combo
NumPad6: Infinite Player Power
NumPad7: Low Enemy Power
NumPad8: Infinite Player Defense Gauge
NumPad9: Low Enemy Defense Gauge
NumPad0: No Player Sidekicks Cooldown
NumPad/: No Enemy Sidekicks
NumPad*: Infinite Jumps
NumPad-: Super Speed
NumPad+: Slow Motion
NumPad.: Change Money By 5000

Editor Options:
Misc: Money
Modifier: Money Multiplier

Notes:

Money Multiplier: While active your gained money is multiplied by 4. You can change the amount by changing the editor item value.

Change / Edit Money: Visit store and press hotkey. Leave store and come back to see changes.