Cartoon Network Punch Time Explosion XL

Do not spend any points until you get this trophy. You will need to have 9001 points on you at one time. This will eventually pop throughout Story Mode (playing on Hard the trophy popped while playing Stage 2 of the Foster's Home Theme). 

Slightly Unrelated Tip: If you do not wish to spend any points until the very end, you will most likely accumulate over 9,999 points. That is the limit the scoreboard will show for some reason. If you open up the store, at the bottom will be your actual point count.