How do you get the silver trench and what level should I be for the silver trench?

p.s. I already have the 3 birds and the lati what do I do next?

You need Surf now. once you have surf, you will see Alakazam in the square. Talk to him, and he will open up Silver Trench for you. Now, Silver Trench is a 99F dungeon with 3-4 fixed, one-room Monster Houses. I recomend maybe... uh... levels 40-50.

be lv 55, and bring a petrify orb, reviver seeds, and don't recruit anyone until you have beaten the dungeon once

Bring up to two one star pokemon, or one two star pokemon so the four star Lugia can join you at the end.

where can i find tm earthquake or tm powder snow for the one room monster houses?

u can only find them in dungeons if ur very lucky

OMG!!! I worked so hard at getting to the last floor and lugia didn't join me and I only had a pikachu and blastoise! Either I'm very lucky or i've been cursed,but at least I didn't use any of my reviver seeds and I know that I need petrify orbs and more max elixers.

I recruited on my first try. I don't know his recruitment percentage, but I think it's lower if you have buddies and lower if one of the birds are w/ you. I am not 100% sure, but I think it's true. If not, blame my brother, he told me , I posted it.

quote wiggle_mickey27

OMG!!! I worked so hard at getting to the last floor and lugia didn't join me and I only had a pikachu and blastoise! Either I'm very lucky or i've been cursed,but at least I didn't use any of my reviver seeds and I know that I need petrify orbs and more max elixers.

i'snt blastoise more then one star?