This is my First list of Pokemon that I know are in this location and my rating on your chance on how likely you are to find them and maybe even some tips.
Unlikely / Rare 1 - 100 Good Chance / Not So Rare
Ice Cave:
Cloyster - 35/100 to 40/100 - Not So Rare But Not Too Easy To Find - I usually find it more on/in the upper left side of the corese than on/in the right side.

Delibird - 40/100 to 50/100 - Not So Rare But Not Too Easy To Find - No Side Notes.

Glalie - 50/100 - Adverage Pokemon - No Side Notes

Spheal - 85/100 - Adverage Pokemon - Easy to find.

Sealeo - 50/100 - Adverage Pokemon - No Side Notes

Smoochum - 75/100 - Adverage Pokemon - Easy to find.

Swinub - 30/100 to 40/100 - Not So Rare But Not Too Easy To Find - No Side Notes.

Dratini - 15/100 to 30/100 - Rare And Not Too Easy To Find -
Shows Up Every Now And Then

Dewgong - 45/100 to 55/100 - Not So Rare But Not Too Easy To Find -
No Side Notes.

Lapras - 30/100 to 40/100 - Not So Rare But Not Too Easy To Find - No Side Notes.

Sneasel - 15/100 to 30/100 - Rare And Not Too Easy To Find -
Shows Up Every Now And Then

UnownO/UnownP - 5/100 to 15/100 - Rare And Not Too Easy To Find -
Shows Up At Random

that all everyone knows that which is easier to catch which is harder!

we already have a map guide so this is not needed