You use the C-Gear. Activate it, select the wireless option, and you'll get the option to warp to the Entralink.
Chat with our AI personalities
to use entra link all you have to do is click wireless on your C-gear and press ENTRALINK which is in the green backround.
Activate your C-Gear. Touch the stylus on the Wireless section on the right, and you'll get the Entralink button, which you can use to warp there.
Go a bit further south, there's an exit portal.
You press wireless on the c-gear and tap entralink and when you get there there should be a forest
It is in White Forest when Herman is the resident, if not, use the Entralink to Pokemon Black version and go to Black City to get to that resident.