If you want to get wget installed on ubuntu snappy core you will need to install some additional packages on the pi 2.
You need to install
libtasn1-3 , libgnutls26 and wget.
First get https://packages.debian.org/wheezy/armhf/libtasn1-3/download, https://packages.debian.org/wheezy/armhf/libgnutls26/download and https://packages.debian.org/wheezy/armhf/wget/download.
Copy them to your Rpi-2 with scp.
scp ~/Downloads/*.deb ubuntu@10.1.10.69:~/
Install it with
sudo dpkg -i ~/libtasn1-3_2.13-2+deb7u1_armhf.deb
sudo dpkg -i ~/libgnutls26_2.12.20-8+deb7u2_armhf.deb
sudo dpkg -i ~/wget_1.13.4-3+deb7u2_armhf.deb
Now you can use wget.
