Confirmed THZ3: Knuckle's Climbing Confusion

[Metal96]

1) Latch onto the oblique wall on the left side of the long side of the THZ3 arena.
2) Climb right.
3)

 

[Monster Iestyn]

Apparently, the same thing can be done on the diagonally opposite corner of the arena to that corner too. o_O Doesn't apply to the other two corners though.