Pet Ratio

Hi there, I just started 2 days ago, read quite a fair bit of posts, all great, locations and pet catching guides. My question with the ratio is that, when its 1:2000, does it mean that it has to spawn 2000 times of monsters, and within 1 of it would be whatever rare or semi-rare mob, or do i just have to walk on top of it for 2000 times.

Also, I saw a lot of infinite dungeon, having a few angelmon? a few metal something? for infinite dungeon of course, should I be getting them early stage or only when I finish the game for pvp and infinite dungeon.

I also have a question about the Chosen Ones, everytime I summon one, ive only summoned liek 2 times, it never does anything, it comes up and doesnt even let me click a skill of sort, dont understand why, need help.

Regarding monster recipes, ive gotten some recipes I think I have, like the season one and all, how do I click into my recipe to view what is needed to be caught to make the S grade mobs. 

Also, can anyone recommend me mobs that I should get? or merged mobs are generally good and I should just aim for them?

On top of that, regarding pet catching methods, I read a post saying that using low level mobs to catch another low level or starter would be better? and regarding the %, if i do see a semi-rare or rare, I should just use 100 gold coins to catch it? or are there better methods

Thank you for your time and moderators, thanks.

The 1/2000 thing is the maximum amount of battles before it spawns meaning on your 2000 battle in a row not finding them it has a 100% chance of spawning, but I’ve never heard of anyone makig it up that far without finding one

First Ones are Berserk Arkadions, you don’t control them, they control themselves

I haven’t done the fuaions in quite a while, but I’m pretty sure you can’t tap on the recipe to find out what arks to use, but I’m pretty sure that is what the silhouettes are for