Its not on seven island its on six island.
Seven island.
northern seven island
her house is on four island.
i think it is in 5
Larvitar can be found in the grass in Sevault Canyon on Seven Island.
After getting the national dex you can find national Pokemon around one island, two island, three island, four island, five island, six island and seven island.
you have to beat the trainers and the time in that place on seven island
Onix can be found on seven island, six island and rock tunnel.
u can find it in the grass of seven island .It is in seuvault canyon
In Sevault Canyon on Seven Island.
to find a legendary Pokemon
You just walk on the grasses and you will find it. (It must take long times to find it.)