There are quite a few Pokemon I would love to return and have evolutions.
Stantler - Was probably one of my most used Pokemon back in the day. Always loved having it in my party.
Delibird - Again, always loved having this Pokemon around. Think an evolution would be great for it.
Pachirisu - Loved this little one.
The bug type Pokemon from Kanto were always my favourite. Would love to see them making a return with some new things.