Pokemon Ranger Question

[superaipom]

For some odd reason, today I got the urge to complete my Fiore Browser and I can't seem to find one tricky pokemon (besides Snorlax). Metagross. I know I can find him in the Go-Rock Squad Base in the Sekra Range, the only problem is getting there. The way you got there before is blocked off, theres no ledge that you can climb. Is there an obvious way to get there that I am missing?

 

[BlueRing]

Did you capture that Tangela? You need 2 of them.
That metagross is hard too...

 

[Chaostorm]

I Agree with BlueRing. Capture 2 Tangelas and use their Field Move