Is the Air Hike skill required for any of the collectables?
The description for the Air Hike skill suggests you can reach higher locations. So is this skill required for any of the collectables/secrets, or can they all be obtained without it?
If it is required, does this apply to all characters, or a specific one/two?
Solution 1:
Having now obtained all collectables I can confirm that the Air Hike skill is not required for any of them.
It does make one of the secret missions a bit easier to complete, but it isn't required.