This solution should hopefully maximize your chances of getting this achievement (and ease your worries about the 40,000 point challenge).
For how specific challenges work, refer to Dwaggienite's solution. When I read the comments and talked to people, everyone got me worried about the 40,000 points challenge.
But this challenge is easy. You don't even need to get all 40K in one frame, but rather the whole match, which can last up to a max of 3 frames (lose 1 and win 2). All points you get are added to your total match score at the end (This has been tested and confirmed). Just make sure you ultimately win the match.
You should be able to easily get 40,000 points in 1 to 1.5 frames. Here is how:
1. First of all, of course use
extended aiming and play on
easy. This needs to be set when you start the career and can't be changed after you've begun.
2.
Play 8-Ball. NOT 9-Ball. In 9-Ball you are forced to play the next ball in the sequence, which limits your shot options significantly. In 8-Ball you can choose which ball you will pot next and you have many of the AI's balls to swerve around and jump over.
3.
Learn how to swerve and jump:
A good starting point for jumps is to press
all the way, and set your power to around 75% (lock it with
). Then play around with the settings until you have the perfect shot. You can also add front/back spin (
/
).
For swerves you just add a spin with
or
to what you did above for the jump. (To get a good swerve you need to have a jump in your shot.)
4. This point is specifically for the get "X points in one match" challenges:
Don't play the ball closest to you. Try to set up a shot that includes a jump as well as a swerve and
traverses the entire table. Preferably, the ball that you are aiming for will be behind some other balls. Don't be afraid to bounce of a bank as well for a kick shot bonus. All this shouldn't be a problem with the extended aiming assist on.
Hope this helps. I got this the first time I tried.
EDIT: It has been brought to my attention that some people had Tournament 6, Round 1 require you to get 40.000 points in 1 frame. This was not the case for me. That round only required 30.000 points and Tournament 6, Round 2 (which has 2 frames), required 40.000 points.