Which ROM hack is THIS

[Sam27105]

There is a ROM hack out there that shows you, in game, the wild Pokemon available on the current route. I've got a feeling there is a small button to press that expands an overlay - it's really convenient!

Does anyone know which ROM hack this is? I'm sure I remember enjoying it so would love to play through it again.

 

[FireBurn256]

Pokemon Fire Red Extended has this. You get a glimpse of all location encounters per type (grass, headbutt for example) when checking specific boards at the location.