This Pokemon is Phione. Go to where you had to go to see Suicune's monument. Phione should be around there.
The newest Pokemon ranger game is Pokemon ranger: Guardian Signs.
It is in the Sky Fortress.
you don't catch it
on the route where you chase the Pokemon pinchers to their sub hideout
in the daybreak ruins in a buch
glameow
porygon2
It is Lugia.
Crobat
sentret
blastoise
Abomasnow
Togepi
latias is in Pokemon ranger signs.
Lugia
fall city is unt in Pokemon ranger guardian signs
Pokémon Ranger: Guardian Signs (Part One) and Pokémon Ranger: Guardian Signs (Part Two) or SS022 and SS023