You can only make normal above ground bases, underground bases are only in diamond and pearl and platinum.
There is no Hoenn Underground only in Sinnoh. Sorry. =(
Under-Water?
I'm not entirely sure but I have heard they are in the Underground. Go there to make your Pokemon happier.
you need a Pokemon that knows secret power use that move to make your secret base
on sapphire/emerald this one boy gives you the move secret power. use it to make a secret base!
A Digger Drill allows you to make a base underground.
no. only codes for spheres.
after catching latias/latios YOU DO NOT HAVE TO CATCH LATIAS/LATIOS TO MAKE A HUT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You cannot go underground in sapphire/ruby/emerald. Only in diamond/pearl/platinum.
go underground and look for them
it goes away
Easy just go to Eterna City and go to the House next to the Pokemon Center, There is old man inside the house go talk to him and he will give you some missions, and for his last mission he will tell you to make your own underground base. He will give you the items to make your base. by Erren