i think this is a losing effort on modern sterns, but some earlier dmd games did teach or at least show you the objective on what to do on each mode.
Last action hero tells you what to do at the start of each mode, the attract mode in the game goes into a little more depth.
Nascar also tells you what to shoot for at the start of each mode
Rocky and Bullwinkle does this too. Im sure there are others.

i know a few WPC games just don't tell you anything and flash various lights so you can guess what to shoot for.

i think the OP means he would be curious if anyone had created a trainer that:
1. showed you what to shoot for to start a mode
2. if you hit the target or sequence, it would then return the ball to a flipper and then tell you the result of what you hit, how it impacts your score etc
3. if you missed, it returns the ball to your flipper so you can try again

maybe the OP can download The Pinball Arcade and go to the Extras section with the rules overview.. how they pointed out what to do with the arrows is pretty good for teaching.

Death saves.

There needs to be a machine that can be setup to practice this.
Ball launch, right outlane, tilt gets more sensitive as the cheater, i mean player's, skill, advances.