
To tick off all the goals in the College map in Tony Hawk’s Pro Skater 4, you need to perform a boneless spine transfer between two courts. Completing this mission requires you to execute a specific move and shift between areas while in the air. Although you can learn how do these tricks by checking the list Tony Hawk’s Pro Skater 3+4 comes with, you need to know where on to perform the boneless spine.
Below, we explain how to complete the College mission and perform a boneless spine transfer between two courts in Tony Hawk’s Pro Skater 4.
How to do a boneless spine transfer between two courts in THPS 4

The first step of performing a boneless spine transfer is finding the perfect spot to do a boneless spine transfer. When you start a run in the College map, go down the stairs in front of you and turn left. You need to enter the area with the basketball and tennis courts.

Now, go to any of the two gray ramps between the courts. To perform a boneless, you need to start holding X/A and double tap Up before jumping on the ramp.
Next, while in the air, you want to hold R2 or RT to do a spine transfer. This trick is perfect to change from one ramp to another on the other side. But in this case, when you do both of these tricks on one of the gray ramps, they will make you change from the basketball court to the tennis court. If you don’t fall after the move, you’ll have completed the mission.

You might need to practice the boneless spine, but if you’re having trouble completing the move, consider activating the mod in the Option menu to never bail. It prevents you from falling, allowing you to worry about the boneless spine transfer part of the move.
Source:https://www.polygon.com/guides/613035/boneless-spine-transfer-between-courts-college-thps-4-tony-hawk-pro-skater