Open the tile editor click on all the tiles that shouldn't be there click save (Note: if this doesn't work at first try it on a different map with the same tilesets

Problem:

solution pt.1

solution pt.2

Fixed!

If your still haveing problems send me the rom in a private message and I'll try to fix it!

The "odds" at the top repressent the frequency you'll see any pokemon.

What you can do though is put the same pokemon in more than once. This will increase the chance of seeing this pokemon

Example:

See how charmander is on here 3 times and bulbasaur only once.
This gives you a 3/4 chance of seeing charmander
And gives you a 1/4 chance of bulbasuar