In the northeastern part of the lake there’s like a Delta Pkm but when I reached him, it seems as it disappear… any advice¿
It’s deta turtig. It went to a different part of the lake. You gotta keep chasing it around 5 times before you can fight it
Ah okay! Let’s go running 
When you mean differente part of the lake, it is not necessary to be just in the that islands near, it could be more in the north?
It can be anywhere (even underwater)
I already found it 4 times. Where can I find it for the fifth (and last) time?
but it should be between boths settlements, isn’t it?